Biology chapter 20 Man and biology mcqs with answer

21. Malaria is caused by:

(a) Mosquito

(b) Protozoa✅

(c) Virus

(d) Bacteria

22. Roundworm causes:

(a) Aseariasis✅

(b) Trichomonas vaginitis

(c) (a) and (b)

(d) None

23. Which of the following kills micro-organisms:

(a) Radiation

(b) Heat

(c) Chemicals

(d) All above✅

24. Which of the following is an antibiotic:

(a) Penicillins

(b) Tetracyclines

(c) Erythromycin

(d) All above✅

25. Which of the following are pathogens:

(a) Bacteria    

(b) Virus

(c) Fungi    

(d) All above✅

26. Rain containing______is called acid rain  

(a) Sulfuric acid

(b) Nitric acid

(c) Both (a) and (b)✅   

(d) None  

27. Ozone filters which rays:

(a) V-rays    

(b) Beta-rays  

(c) Gamma rays✅

(d) IR rays  

28. Keeping of Honey bees is called:  

   

(a) Sericulture    

(b) Culture

(c) Poultry culture✅   

(d) None  

29. Rearing silkworms is know as:  

   

(a) Apiculture    

(b) Sericulture✅

(c) Poultry culture    

(d) None  

30. T.B. is common in:  

   

(a) Rainy areas✅    

(b) Subtropical area

(c) Tropical area    

(d) None of them  

31. Which Bacteria causes T.B.  

(a) Mycobacterium✅    

(b) Mycoplasm  

(c) Borderella    

(d) Conynibacterium  

32. BDG is used for:  

(a) T.B. vaccination✅    

(b) Polio vaccination  

(c) Diphtheria vaccination  

(d) None  

33. Cholera is caused by:  

   

(a) Mycobacterium    

(b) Vibrio✅

(c) B. anthraus    

(d) Borderella  

34. Rains containing acid, dissolve ______ salts in the soil and washes them into lakes and rivers:  

   

(a) Cromium    

(b) Aluminium✅

(c) Carbon    

(d) Chlorids  

35. The removal of top soil from one place to another due to wind, flood and heavy rain is called:

(a) Soil replacement 

(b) Soil loss  

(c) Soil erosion✅

(d) all above  

36. Micro-organisms causing diseases are called:  

(a) Pathogens✅

(b) Harmful  

(c) Useful

(d) Microgens  

37. The smallest disease causing particles, known to us are:  

   

(a) Bacteria 

(b) Protozone

(c) Fungi 

(d) Viruses✅

38. Largest organism to parasitize human beings is:  

   

(a) Tap worms✅

(b) Flat worms

(c) Round worms 

(d) None of them  

39. Body of tap worm is segmented and each segment is called:  

   

(a) Siolex 

(b) Rostellium

(c) Strobilis 

(d) Proglottide✅

40. House fly is a ______ vector:  

   

(a) Biological 

(b) Physical

(c) Mechanical✅

(d) Trangenic

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Biology chapter 20 Man and biology

1. A phenomenon, which is used for the transfer of genes from one organism to another, is called:

(a) Genetic Engineering✅

(b) Genetics

(c) (a) and (b)

(d) None

2. Vector used for the transfer of gene is usually:

(a) Plasmids✅

(b) Viral DNA

(c) Bacterial DNA

(d) All

3. Diseases caused by bacteria are:

(a) Polio and T.B

(b) Cholera and measles

(c) AIDS and Dysentery

(d) T.B and Cholera✅

4. Recycling of material is great advantage because it:

(a) Reduces waste disposal

(b) Reduces pollution

(c) Saves energy and money

(d) All above✅

5. Man brings undesirable changes in the environment and pollutes:

(a) The air

(b) The water

(c) The soil

(d) All above✅

6. The use of micro-organisms to make useful substances for man is called:

(a) Biology

(b) Genetics

(c) Biotechnology✅

(d) Genetic engineering

7. Micro-organisms include:

(a) Bacteria

(b) Fungi

(c) Viruses

(d) All above✅

8. The materials that can be split into simpler compounds are called:

(a) Biodegradable✅

(b) Decomposed

(c) Non-biodegradable

(d) (a) and (b)

9. Which of the following is recycled in nature:

(a) Carbon

(b) Oxygen

(c) Water

(d) All above✅

10. Pests can be controlled:

(a) Biologically

(b) Chemically

(c) Mechanically

(d) All above✅

11. Bringing of undesirable changes in the environment is called:

(a) Harsh changes

(b) Bad changes

(c) Pollution✅

(d) All above

12. Which of the following do forests supply:

(a) Oxygen

(b) Fruits

(c) Timber and medicine

(d) All above✅

13. Yeast ferments sugar into:

(a) Glucose

(b) Alcohol✅

(c) Spirite

(d) None

14. Dough flour rises due to:

(a) CO₂✅

(b) O₂

(c) Nitrogen

(d) None

15. Which of the following is a decomposer:

(a) Fungi

(b) Bacteria

(c) Both (a) and (b)✅

(d) All above

16. Which of the following are viral diseases?

(a) T.B and cholera

(b) T.B. and polio

(c) Measles and polio✅

(d) AIDS and T.B

17. AIDS is transmitted through:

(a) Sexual contact

(b) Syringes

(c) Blood transfusion

(d) All above✅

18. AIDS is caused by:

(a) HIV virus✅

(b) HBV virus

(c) HCV virus

(d) Picorno virus

19. Athlete's foot disease is caused by:

(a) Fungi✅

(b) Algae

(c) Bacteria

(d) Virus

20. Ringworm is caused by:

(a) Virus

(b) Bacteria

(c) Fungi✅

(d) Algae

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Biology chapter environmental biology solved mcqs

41. Sea Anemone and gastropod shells inhabited by hermite crabs are:

(a) Mutuals

(b) Commensals✅

(c) Symbionts

(d) All above

42. The association in which different species live together in a mutually advantageous relationship is called:

(a) Commensalism

(b) Mutualism✅

(c) Symbiosis

(d) None

43. Flagellate protozoans and termites are example of:

(a) Symbionts

(b) Commensals

(c) Mutuals✅

(d) None

44. The association between different species in which one is benefited and other is harmed is called:

(a) Parasitism

(b) Commensalism✅

(c) Symbiosis

(d) Mutualism

45. Human lice is an example of:

(a) Commensal

(b) Ectoparasite✅

(c) Endoparasite

(d) None

46. Round worms are example of:

(a) Endoparasites✅

(b) Ectoparasite

(c) Sponophyte

(d) Saprophyte

47. What is the cause of extreme environment:

(a) Agriculture

(b) Industrialisation

(c) both (a) and (b)✅

(d) None

48. Temperature, light, soil and air are examples of:

(a) Biotic factors

(b) Abiotic factors✅

(c) Environmental factors

(d) All above

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Biology chapter Environmental Biology

 21. Those that eat herbivores are called:

    

(a) Primary consumers

(b) Secondary consumer

(c) Primary carious

(d) (a) and (c)✅

22. Animals that eat both plants and animals are called:

(a) Herbivores 

(b) Nivores

(c) Omnivores✅

(d) All above

23. Man is an example of:

    

(a) Omnivores✅

(b) Herbivore

(c) Carnivores 

(d) None

24. Organisms that derive their energy by decomposing dead remains of animals and plants are called:

    

(a) Producers 

(b) Consumers

(c) Decomposers✅

(d) None of the above

25. The inter relationship between organisms in getting of their food is known as:

(a) Food web 

(b) Food chain✅

(c) Both a and b 

(d) None

26. Different chains are linked together to form a:

(a) food web✅

(b) food chain

(c) both a and b 

(d) (a) or (b)

27. Organisms at the beginning of a food chain are usually:

(a) Numerous 

(b) Small in size

(c) both a and b✅

(d) None above

28. The animals at the end of the chain are often:

(a) Large 

(b) few in number

(c) both a and b✅

(d) None

29. The weight of a species population per unit area is called:

(a) biomass✅

(b) Boatwright

(c) Total weight 

(d) None above

30. The energy is transferred by:

(a) water 

(b) animals

(c) Eating being eaten✅

(d) None

31. The dead bodies of plants and animals are decomposed by:

(a) Micro-organisms✅

(b) Flies

(c) Earth 

(d) All above

32. The earth atmosphere contain nitrogen gas by volume:

(a) 78%✅

(b) 90%

(c) 85% 

(d) 50%

33. Nitrogen fixing bacteria are found in:

(a) Soil

(b) Root nodules of leguminous

(c) Both (a) and (b)✅

(d) None

34. Nitrogenous waste in animals is/are:

(a) Urea✅

(b) Uric acid

(c) Ammonia

(d) All above

35. In soil urea is converted to:

(a) Ammonia

(b) Nitrites

(c) both a and b✅

(d) None

36. The only thing required by an ecosystem from the outside is:

(a) Energy✅

(b) Heat

(c) Food

(d) None

37. The competition between members of different species is called:

(a) Site-specific competition✅

(b) Intraspecific competition

(c) Special competition

(d) (a) or (b)

38. Struggle between members of the same species is called:

(a) Intraspecific competition✅

(b) Interspecific competition

(c) Specific competition

(d) None

39. The association between organisms of different species, which live together for mutual benefit, is called:

(a) Symbiosis✅

(b) Parasitism

(c) Commensalism

(d) None

40. The association in which one partner gain benefit without benefiting or harming the other.

(a) Commensalism✅

(b) Symbiosis

(c) Mutualism

(d) None

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Biology chapter 19 Environmental Biology

1. All those things in the surrounding of an organism that could possibly influence it is called:

(a) Environment✅

(b) Surrounding

(c) Atmosphere 

(d) All above

2. Environment provides:

(a) Food 

(b) Water

(c) Shelter 

(d) All above✅

3. The nonliving environment is called:

(a) Abiotic component

(b) Physical component

(c) (a) and (b)✅

(d) None

4. A group of similar organisms that can interbreed and produce fertile offsprings is called:

(a) Genus 

(b) Family

(c) Species✅

(d) Order

5. Place where an organism lives in its environment is called:

(a) Population 

(b) Residence

(c) Habitat✅

(d) All  

6. Rotten log farm habitat for:  

(a) Micro-organisms 

(b) Fungi

(c) Insects 

(d) All above✅

7. A group of individuals of the same species occupying a given area at the same time is called:

  

(a) Residents 

(b) population✅

(c) Family 

(d) All above  

8. Many different populations requiring the same resources, living and interacting with one another in a given habitat are called:

(a) Community✅

(b) Environment

(c) Habitat 

(d) Environment  

9. The environment of an area where living organisms, both plants and animals, interact with their physical environment is called:  

(a) Community 

(b) Special environment

(c) Ecosystem✅

(d) None  

10. The variety of species in ecosystem is called:  

(a) Biodiversity✅

(b) Animal diversity  

(c) Organisms diversity 

(d) All above  

11. Which of the following is self maintained.

(a) Community 

(b) Ecosystem✅

(c) Population 

(d) Species  

12. The alternate source of energy of ecosystem is:

(a) Solar energy✅ 

(b) Heat energy

(c) Tidal energy 

(d) Nuclear energy  

13. Forests and deserts are the example of:  

(a) Ecosystem 

(b) Terrestrial ecosystem✅

(c) Aquatic ecosystem 

(d) None  

14. Things which interacts in ecosystem are called:  

   

(a) Factors✅

(b) Cofactors

(c) Animals and plants 

(d) All above  

15. The living factor of ecosystem is called:

(a) Biotic component✅

(b) Non Biotic component

(c) biologic 

(d) None

16. Which of the following are biotic factors:

    

(a) Producers 

(b) Consumers

(c) Decomposer 

(d) All above✅

17. Green plants, which can manufacture their own food, are called:

(a) Producers✅

(b) Consumers

(c) Decomposers 

(d) None

18. Phytoplankton is an example of:

(a) Producer✅

(b) Consumer

(c) Decomposer 

(d) None

19. Those animals, which obtain food by eating plants and animals, are called:

    

(a) Producers 

(b) Consumers✅

(c) Decomposers 

(d) All above

20. Consumers that feed directly on plants are called:

    

(a) Primary✅

(b) Secondary

(c) Omnivores 

(d) None

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Biology Chapter 18 Evolution solved mcqs

1. Which of the following is associated with Darwin.

 

(a) The principle of heredity  

(b) The origin of species✅ 

(c) Structure of chromosome  

(d) Theory of acquired characters  

2. Variation is not produced by:  

   

(a) Crossing over  

(b) Mutation  

(c) Fertilization

(d) Use and disuse of certain organs✅

3. What is the correct statement about the Darwins theory of evolution: 

(a) It is against Quran  

(b) It is the disgrace of Human beings.  

(c) It is perfectly wrong  

(d) All above✅

4. Types of variation in which there are small differences among individual of the same species is called:

(a) Discontinuous variation  

(b) Continuous variation✅

(c) (a) and (b) 

(d) None

5. Theory of continuous and gradual evolution of life from simple to complex and from imperfect to perfect form proposed by:

(a) Darwin    

(b) Aristotle✅

(c) Malthus    

(d) Pethagorian

6. Variation in which there is sharp differences among the individual of species and do not show any intermediate forms, is called:

(a) Discontinuous✅

(b) Continuous

(c) Constant    

(d) None

7. Human population increases geometrically and food supply increases arithmetically, which result in severe competition. This theory was proposed by:

(a) Charles Lyell    

(b) Mathus✅

(c) Darwin    

(d) Aristotle

8. The theory of evolution by lamarck was presented in his book:

(a) Micrographia    

(b) Origin of life

(c) Philosophie zoologique✅

(d) None of them

9. Variations in phenotype due to use or disuse of body are called:

(a) Inherited characters

(b) Acquired characters✅

(c) Variable characters

(d) Phenotype character

10. Lamarck believed that acquired characters are:

(a) Silent    

(b) Inheretable

(c) Heretiable✅

(d) None of them

11. Lamarck's theory of evolution lays emphasis on biological needs, which arise as a result of change in:

 

(a) Habitate    

(b) Environment✅

(c) Biosphere

(d) Biome

12. The salient features of Darwin's theory of evolution are:

(a) Over production

(b) Competition for survival

(c) Heritable variations 

(d) Natural selection

(e) a, b and c    

(f) All of them✅

13. According to Darwin the original giraffe population had ______ in the length of their necks:

(a) Different phenotype 

(b) Variations✅

(c) Generations    

(d) Verities

14. Evidence for evolutions is/are:

(a) Comparative anatomy

(b) Comparative physiology

(c) Artificial selection

(d) a and c✅

15. The evolutionary process producing these organs is called:

(a) Convergent evolution

(b) Divergent evolution✅

(c) Jep-speed evolution

(d) Common evolution

16. The process responsible for the development of analogous organs is called:

(a) Convergent evolution✅

(b) Divergent evolution

(c) Spontaneous evolution

(d) Point evolution

17. Which of the following is not a part of Darwinism:

(a) Over production

(b) Inheritance of acquired✅

(c) Natural selection

(d) Competition for survival

18. According to Lamarck the organs which are used more, are:

(a) Better developed✅

(b) less developed

(c) Completely lost

(d) Remained same

19. Two types of variations among population of organisms are:

(a) Continuous variation

(b) Intermediate variation

(c) Discontinuous variation

(d) a and c✅

20. The process in which organisms are selected for production of new organisms with desired characteristics is known:

(a) Genetic engineering

(b) Selective breading✅

(c) Species development

(d) Gene therapy

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Chapter 17 Genes and Inheritance solved mcqs

41. In 1991 male determining gene ___ was discovered on y-chromosome.

(a) SRY✅

(b) SSy  

(c) CIT 

(d) CAT  

42. The phenotypic ratio of F\(_2\) generation in law of independent assortment is:

(a) 3:1 

(b) 9:3:2:1✅ 

(c) 9:3:3:2 

(d) 9:3:3:1  

43. A cross during which inheritance of two traits is studied at a time is:  

(a) Monohybrid 

(b) Dihybrid✅

(c) Both a and b 

(d) None  

44. The offspring's of two true breeding parents are named by Mendal as:  

(a) F\(_1\) or first filial generation✅  

(b) F\(_2\) or second filial generation  

(c) F\(_3\) or 3rd filial generation  

(d) None  

45. The trait which appeared in F\(_1\) generation was named by Mendal as:

(a) Recessive 

(b) Healthy  

(c) Dominant✅

(d) all  

46. The trait which was hidden in F\(_1\) generation named as:  

(a) Homozygous 

(b) Recessive✅

(c) Super 

(d) Unfit  

47. When both alleles of a gene pair in an organism are same, the gene pair is said as:

(a) Homozygous✅

(b) Heterozygous  

(c) Heptozygous 

(d) All above  

48. When both genes of an allele pair are different, the organism is ___ for that pair:

 

(a) Heterozygous✅

(b) HemozygousHemozygous

(c) Multizygous

(d) None

49. An individual with a heterozygous genotype is called:

(a) Homozygous 

(b) Heterozygous✅

(c) Homozygote 

(d) Heterozygote  

50. "Two coexisting alleles of an individual for each trait

segregate during gamete formation, so that each  

gamete get are of the two alleles" this is called,  

(a) Law of independent assortment  

(b) Law of segregation✅  

(c) Law of unification  

(d) Law of inheritance  

51. DNA consists of:

(a) Nucleotides✅

(b) Neocleotide  

(c) Nucleus 

(d) Dexoxyribose  

52. Nucleotide consists of:

(a) Nitrogenous base  

(b) Phosphate group  

(c) 5-C sugar  

(d) All above✅

53. Which is the heredity material:

  

(a) DNA✅

(b) ribosomes  

(c) Proteins 

(d) Nucleus  

54. Watson and Crick revealed structure and replica  

of:  

(a) DNA✅

(b) RNA  

(c) Ribosome 

(d) Nucleus  

55. Which has made possible to bring desirable change in animals and plants:  

(a) Genetic engineering  

(b) Recombinant DNA technology✅ 

(c) Biochemistry  

(d) None

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Biology Chapter 17 Genes and Inheritance important mcqs solved

21. A sudden change in the genome is called:

(a) Mutation✅

(b) Mutant

(c) change 

(d) All above

22. A sudden change in gene structure is called:

(a) Gene defect 

(b) Chromosome defect

(c) Mutation✅

(d) None

23. In the genome of a haploid organism each gene represents itself as a single:

(a) character 

(b) Allele✅

(c) Genome 

(d) antity

24. The gene in an individual for a particular trait represents:

(a) Genome    

(b) Genotype✅

(c) Phenotype   

(d) None

25. A trait having at least two distinct phenotype is called:

   

(a) Inferior trait    

(b) normal trait

(c) Simple trait✅

(d) Good trait

26. What is genotypic ratio of offspring of a monohybrid cross.

(a) 1:2:1✅

(b) 1:1:1

(c) 3:1    

(d) 9:3:3:1

27. Which is the genotype of diabetic person:

(a) DD    

(b) Dd

(c) dd ✅

(d) None

28. What will be the chance of a diabetic baby, born to Parents both heterozygous normal:

(a) Zero    

(b) ¼ ✅

(c) 3/4    

(d) 1/2

29. Which is responsible for maleness?

(a) Y-chromosome✅

(b) X-chromosome

(c) Heterologous

(d) homologous

30. Which type of trait colour blindness is:

   

(a) Autosmal    

(b) X-linked recessive✅

(c) X-linked    

(d) Y-linked

31. Who was produced by genetic engineering:

(a) Jersey-Saiiwal cow

(b) Dhai ox

(c) Nancy sheep✅

(d) Rahn-thaila carp

32. Passing on of characteristics from parents to children is called:

(a) Heredity✅

(b) Genetics

(c) Rait study    

(d) None

33. All instructions about life of a cell are encoded in:

(a) Gene✅

(b) chromosome

(c) Nucleotide    

(d) None

34. Genetic variations among offspring’s lead to tremendous variety in their:

(a) Family    

(b) genus

(c) Traits✅

(d) phyllum

35. DNA is know as:

(a) Gene material    

(b) chromosomal material

(c) Evolutionary material 

(d) Gentic material✅

36. Nucleotides of DNA are joined together in long chain called:

(a) Polynucleotide✅ 

(b) long nucleotide

(c) Straight nucleotide    

(d) polycromosome

37. Chromosomes determining sex are called:

(a) Sex chromosomes✅

(b) Homologous chromosomes

(c) Heterologous chromosomes

(d) None

38. The trait for which gene is located on the x-chromosome is called:

(a) x-linked✅   

(b) sex linked

(c) y-linked    

(d) (a) and (b)

39. Alleles for colour blindness and hemophilia are present on:

(a) Autosomes    

(b) Y-chromosome

(c) X-chromosome✅

(d) None

40. Haemophilia is also called:

(a) Women’s disease

(b) Male’s disease

(c) Bleeder’s disease✅

(d) All

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Biology Chapter 17 Genes and Inheritance solved mcqs

 1. After the process of meiosis the nucleus of the cell contain ______ number chromosomes:

(a) Haploid✅

(b) Diploid

(c) Triploid    

(d) Polyploid

2. Nucleus of the cell contains genes which are located on:

(a) Nuclear membrane

(b) Necloelus

(c) Chromosomes✅

(d) Nuclear fluid

3. An adult female animal has 48 chromosomes. How many chromosomes will be found in its gamete cell.

(a) 12    

(b) 24✅

(c) 48    

(d) 72

4. Genes affecting the same character, are located on the same position in homologous chromosomes and are called:

(a) Autosomes    

(b) Alleles✅

(c) Loci    

(d) Chromatids

5. The number of autosomal chromosomes present in the fruit fly are:

 

(a) 2    

(b) 3

(c) 6✅

(d) 8

6. Which of the following base pairing is correct:

(a) Adenine with cytosine (AC)

(b) Adenine with guanine (AG)

(c) Cytocine with guanin (CG)✅

(d) Thiamine with cytosine (CT)

7. Genes responsible for colour blindness are located on:

(a) X-chromosomes    

(b) Y-chromosomes✅

(c) Autosomal chromoses

(d) Both on X and Y

8. ______ to transmit biological information

(a) gene✅

(b) Chromosomes

(c) Gametes

(d) Nuclear

9. What is 2n number of chromosomes in man

(a) 46✅

(b) 14

(c) 8    

(d) 26

10. Appearance of trait in an individual is its:

(a) Genotype    

(b) Phenotype✅

(c) Kanyotype    

(d) Genome

11. Crossing over takes place between:

(a) Homologous chromosomes✅

(b) Heterologous chromosomes

(c) Chromatids

(d) Sister chromosomes

12. What condenses into a chromosome.

(a) Nucleoplasm 

(b) Nucleolus

(c) Chromatic material✅

(d) Cytoplasm

13. Chromatin consists of:

(a) Proteins    

(b) DWA and proteins✅

(c) DNA 

(d) RNA

14. What is the backbone of DNA

(a) Phosphate 

(b) Drosyribose

(c) Nitrogenous 

(d) Phosphate + drosyribose✅

15. ______ is not found in DNA.

(a) Thymine 

(b) Ademine

(c) Uracil✅

(d) Guanine

16. In DNA, guanine pairs up with:

(a) Thymine 

(b) Ademine

(c) Uracil 

(d) Cytosine✅

17. Only RNA contains:

(a) Uracil 

(b) ribose

(c) Deoxyribose 

(d) Ribose and uracil✅

18. Mendels worked on how many contrasting pairs of traits.

(a) 5 

(b) 7✅

(c) 10 

(d) 14

19. An individual with a heterozygous genotype is a:

(a) Heterozygote 

(b) Hybrid✅

(c) Homozygote 

(d) Hemizygote

20. The phenomenon of staying together of all the genes of a chromosome is called:

(a) Genotype 

(b) Linkage✅

(c) Mutant 

(d) none of them

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Biology chapter 16 Reproduction mcqs solved

41. The types of vegetative propagation in plants are:

    

(a) by leaves    

(b) by roots

(c) by stem    

(d) by seeds

(e) all of them✅

42. The methods of artificial vegetative propagation are:

(a) graftings    

(b) cutting

(c) underground stem  

(d) all of them✅

43. A type of artificial vegetative propagation in which individuals are produced from single parent with identical properties as in parent is called:

    

(a) cloning✅

(b) Cutting

(c) grafting    

(d) underground stem

44. As a result of double fertilization, fusion nucleus give rise to:

    

(a) Fruit    

(b) Seeds

(c) Water storing tissue 

(d) Food storing tissue✅

45. Parthenocarpic fruits may be formed by the ovary in which no ______ occurs:

(a) Fertilization✅

(b) Pollination

(c) Development    

(d) None of these

46. In rhizopus, sporangium containing spores are produced or born:

(a) On filaments

(b) On the tips of sporangiopheres✅

(c) On the stolon hyphae

(d) On rhizoids

47. Each spore when exposed to suitable conditions form new:

(a) mycelium✅

(b) sporangiopores

(c) stolon hyphae    

(d) None of them

48. Method of vegetative propagation in plants are:

(a) By seeds    

(b) By stem

(c) By roots    

(d) All of them✅

49. The example of a plant showing vegetative propagation by leaf is:

(a) Grasses    

(b) Bryophyllum✅

(c) Banana    

(d) strawberry

50. Flowers spread through wind pollination are usually:

(a) produce nectar

(b) lighter in weight

(c) with long feathering stigma

(d) a, b and c✅

51. The examples of flowers showing pollination through water are:

(a) Potamogeton    

(b) Coconut✅

(c) Vallisneria    

(d) None of these

52. After fertilization ___ developed into seed:

(a) Ovary    

(b) Stigma

(c) Ovule✅

(d) Egg

53. The plants in which seeds and fruits are dispersed by wind are:

(a) Grasses    

(b) Bombax

(c) Calotropis    

(d) All of them✅

54. The dispersal of seed by water occurs in plants:

(a) Lotus    

(b) Daffodils

(c) Coconut    

(d) All of them✅

55. The dome shape wall in the sporangium present in center is called:

(a) peripheral wall    

(b) Columella✅

(c) Central swelling    

(d) None of them

56. In the grain of maize, the cotyledon is modified into an organ called:

(a) Shield    

(b) Scutellum✅

(c) Endosperm    

(d) All of them

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Biology chapter 16 Reproduction important mcqs

21. Fertilization in flowering plants is called double fertilization because:

(a) One tube nucleus fuses with one egg and one sperm nucleus fuses with another egg.

(b) One sperm nucleus fuses with egg and another sperm nucleus fuses with fusion nucleus.✅

(c) Two sperm nuclei fuses with one egg.

(a) None of the above  

22. In peach, the fruit is derived from the:  

(a) Megaspores 

(b) Endospores✅

(c) Walls of the ovary 

(d) Petals 

 

23. The nucleus of the egg is located in the:  

(a) Vegetal hemisphere 

(b) Animal hemisphere✅

(c) Equator 

(d) Middle  

24. In plants the gametophytes produce egg and sperm by:  

(a) Meiosis✅

(b) Mitosis  

(c) Spore formation 

(d) Fertilization

  

25. If you found a dark, rotten smelling flower near the ground it would most likely be pollinated by:  

(a) Bats 

(b) Beetles  

(c) Moths✅

(d) Bees  

26. The intestine of frog develops from:  

(a) Endoderm✅

(b) Mesoderm  

(c) Ectoderm 

(d) None of the above  

27. Two main types of reproduction are:  

(a) Sexual 

(b) Binary fission  

(c) Asexual 

(d) Both a and c✅

28. Fruits and seeds helps in:  

(a) Dispersal of plants 

(b) dispersal of food  

(c) Dispersal of species 

(d) All of the above✅

 

29. The rapid cell division of the zygote which results in the development of morula is:  

(a) cleavage✅

(b) modulation  

(c) gastrulation 

(d) all of them  

30. The process by which a tadpole changes into a frog is called:  

(a) Growth 

(b) Development  

(c) Metamorphosis✅

(d) a and b

31. The stage of development of frog zygote, during which ball of cells contains a cavity blastocoel is called:

(a) Blastulation✅

(b) Gastrulation

(c) Archenteron    

(d) Any of them

32. In frog fertilization is ______ and occurs:

(a) Internal and on ground

(b) External and on pasture

(c) External and in the water✅

(d) None of them

33. As soon as the nervous system is formed, the embryo becomes:

(a) Morula    

(b) Blastula

(c) Gastrula    

(d) Neurula✅

34. Reproduction is a biological process leading to production of:

   

(a) New species,    

(b) New genera

(c) New individuals of one's own kind✅

(d) None of the above

35. Two types of seed germination are:

   

(a) Hypogeal    

(b) Epigeal

(c) Stapgeal    

(d) Both a and b✅

36. Necessary conditions for seed germination are:

(a) Water and air    

(b) Viability of seed

(c) Suitable temperature 

(d) All of these✅

37. In Animals the process of formation of sperm is called:

(a) Spermatogenesis✅

(b) Oogenesis

(c) Gluconeogenesis    

(d) None of the above

38. In plants pollination plays an important role during:

(a) Parthenogenesis

(b) Sexual reproduction✅

(c) A-Sexual reproduction

(d) None of trhizoids

39. Different types of sexual reproduction are:

(a) Binary fission    

(b) Multiple fission 

(c) Spore formation 

(d) None of them✅

40. Process of asexual reproduction which involves the vegetative parts of flowering plants is called:

(a) Vegetative propagation 

(b) Parthenogenesis 

(c) Asexual reproduction    

(d) all of them✅

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Biology chapter 16 Reproduction sloved mcqs

1. The plumule of embryo give rise to the:

(a) Primary stem✅

(b) Secondary root

(c) Roots

(d) All of these

2. The embryos usually consists of:

(a) Seeds leaves

(b) Epicotyle

(c) Cotyledons and hypocotyle

(d) All of them✅

3. When the cotyledons appear above the ground by elongation of hypocotyls, this germination is:

(a) Hypogee

(b) Epigeal✅

(c) Intergeal

None of them

4. Germination of seeds occur over a wide range of temperature between:

(a) 5C-15C

(b) 5C-35C✅

(c) 10C-20C

(d) 5C-35C

5. The events which are involved in the germination of an adult from a fertilized egg are called:

(a) Reproduction

(b) Growth

(c) Development✅

(d) None of them

6. The embryo develops into a new individual through:

(a) Growth  

(b) Cell division  

(c) Differentiation  

(d) All of the above✅

7. When fusion of male and female gametes takes place inside the body of female is called:  

(a) Fertilization  

(b) Internal fertilization✅

(c) Inward fertilization  

(d) Safe fertilization  

8. The mesoderm from behind the dorsal lip give rise to the:

(a) Somites  

(b) Nephrostome  

(c) Notochord✅

(d) Gut  

9. The gametophyte generation produces gametes by the process of:  

(a) Meiosis✅

(b) Binary fission  

(c) Vegetative propagation  

(d) Mitosis  

10. Gastrula is characterized by the formation of:

(a) Three germinal layers✅

(b) Gut  

(c) Nervous system  

(d) All of them  

11. The portion of the embryo below the point of attachment of cotyledons to the embryo axis is called:  

(a) Radical  

(b) Epicotyl  

(c) Hypocotyl✅

(d) Plumule  

12. The first structure emerging from germination of seed and growing rapidly is:

(a) Root  

(b) Leaves  

(c) Stem✅

(d) All of them  

13. When the cotyledons remains below the soil and epicotyl elongates, this type of germination is called:  

(a) Supergeal  

(b) Hypogeal✅

(c) Intergeal  

(d) Digeal  

14. Type of reproduction which does not involve fusion of gametes is called:

(a) Asexual✅

(b) Sexual

(c) Parthenogenesis 

(d) None of them

15. The eggs are produced in thin walled sacs called:

(a) Ovaries✅

(b) Testes

(c) Hemispheres 

(d) None of them

16. If the fusion of male and female gametes takes place outside the body it is called:

(a) Pollination 

(b) External fertilization✅

(c) Internal fertilization 

(d) Fertilization

17. The cells along the margins of the blastopore move inward to form the:

(a) Ectoderm 

(b) Endoderm

(c) Mesoderm 

(d) Both (a) and (b)✅

18. Neural with the formation of gills and tails develops into:

(a) Neurula 

(b) Tadpole

(c) Morula ✅

(d) None of them

19. In the life history of flowering plant the generations are:

(a) Gametophyte ✅

(b) Sporophyte

(c) Tracheophyte 

(d) Both b and c

20. The bee picks up pollen from the --- of flower and carries it to another flower:

(a) Ovary 

(b) Stigma

(c) Anther ✅

(d) Sepals

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Biology chapter 15 co-ordination and response

1. When the lens of the eye becomes opaque it is called:

(a) Cataract✅

(b) Glaucoma

(c) Squint    

(d) Long sightedness

2. Testosterone is the hormone secreted by:

(a) Ovary    

(b) Testis✅

(c) Pancreas    

(d) Adrenal gland

3. Auxin is produced in:

(a) Leaf    

(b) Root

(c) Stem tip✅

(d) Flowers

4. Goitre is due to the deficiency of iodine due to enlargement of:

(a) Thyroid gland✅

(b) Parathyroid gland

(c) Pituitary gland    

(d) Pancreas

5. The number of pair of nerves arising from the brain are:

(a) 32 pairs    

(b) 21 pairs

(c) 12 pairs✅

(d) 10 pairs

6. The neurons which carry messages from the receptor to the central nervous system are called:

(a) Sensory neurons✅

(b) motor

(c) Involuntary action     

(d) None    

7. Riding and singing are:   

(a) Reflex action    

(b) Voluntary actions✅

(c) Involuntary actions     

(d) None of these  

8. Auxin, Cytokinins and Gibberellins are:  

(a) Plant hormones✅

(b) Animal hormones   

(c) Pituitary hormones    

(d) Drugs    

9. Adrenaline hormones secreted by adrenal gland and prepares the body for:

(a) Fight     

(b) Flight    

(c) Emergencies✅

(d) None    

10. The hormones which are related with development of secondary sex-characters are:  

(a) Testosterone     

(b) Oestrogen 

(c) a and b✅

(d) none of these 

11. The example of most addictive drug, affecting CNS is:

(a) Morphine   

(b) Cocaine    

(c) Heroin✅

(d) Aspirin 

12. Marijuana (Charas) produces:  

(a) Toxicity   

(b) Infertility   

(c) Lightened sensation and hallucination✅

(d) None of these 

13. Paralysis is characterized by:

 

 (a) loss of power or motion     

 (b) loss of sensation

 (c) both a and b✅

 (d) convulsion and coma  

14. Gibberellin causes:   

 

(a) Rapid elongation of stem  

(b) Breaking seed dormancy

(c) Flowering and early fruiting

(d) All of them✅

15. Nicotine present in cigarette is:

(a) Carcinogenic  

(b) Damage to foetus  

(c) Cause of pre-mature birth  

(d) All✅

16. Aspirin has the following useful effects:  

(a) Analgesic  

(b) Antipyretic  

(c) Anti-inflammatory 

(d) Anti thrombotic  

(e) All✅

17. Abscisic acid is a:  

(a) Plant hormone 

(b) Animal hormone  

(c) drug 

(d) Toxin✅

18. The neurons in central nervous system are:

 

(a) Sensory 

(b) Associative✅

(c) Motor 

(d) All above  

19. The sensitive layer of the eye is:  

(a) Choroid 

(b) Sclerotic  

(c) Retina✅

(d) Cornea  

20. The main part of ear concerned with hearing is:  

(a) Ear drum 

(b) Membranous labyrinth✅

(c) Pinna 

(d) Semi circular canal  

21. The work of organs and systems of body in harmonized manner is called:  

(a) Performance 

(b) Co-ordination✅

(c) Regulation 

(d) Organization  

22. Following system brings about coordination in animals:

  

(a) Endocrine system 

(b) Exocrine system  

(c) C.N.S. 

(d) a and c✅

23. Sensory organs which can receive a stimulus are called:

(a) Effectors 

(b) Receptors✅

(c) Detectors 

(d) All  

24. The nervous pathway which carry the impulses causing a reflex action is called:

(a) Reflex point  

(b) Reflex arc✅

(c) Reflex rail  

(d) Reflex way  

25. Hypothalamus controls:

(a) Heart rate and B.P.  

(b) Body temperature✅

(c) Hunger and thirst  

(d) Sex and anger  

(e) All above  

26. Mood and feelings are controlled by:

(a) Hypothalamus  

(b) Cerebellum  

(c) Pons  

(d) Thalamus✅

27. Balancing and muscle co-ordination is controlled by:

(a) Cerebrum  

(b) Cerebellum✅

(c) Medulla oblongata  

(d) Pons  

28. The autonomic nervous system consists of:

 

(a) Peripheral nervous system  

(b) Sympathetic nervous system  

(c) Parasympathetic nervous system  

(d) b and c✅

29. An action which takes place willingly under the direction from brain is called:

(a) Involuntary action  

(b) Voluntary action✅

(c) Reflex action  

(d) Unconscious  

30. Thyroid gland produces:

(a) Thyroxin✅

(b) Calcitonin  

(c) Glucocorticoid  

(d) Mineralocorticoid  

31. Parathyroid gland control blood level of:

(a) Glucose  

(b) Sodium  

(c) Ca++ and phosphate✅

(d) All above  

32. Growth hormone of pituitary gland is also called:

(a) Somatotropic✅

(b) Antidiuretic  

(c) Diabetic  

(d) All above  

33. Endocrine portion of pancreas is called:

(a) Islets of Langerhans✅

(b) Endocrine pancreas  

(c) Anterior pancreas  

(d) All above  

34. Diabetes mellitus arise from insufficiency of:

(a) Insulin✅

(b) Glucagon

(c) Cortisol    

(d) All above

35. Example of effector is:

(a) Muscle    

(b) Bone

(c) Gland    

(d) a and c✅

36. Cytokinin causes:

(a) Cell division

(b) Germination of seed

(c) Fruit development  

(d) All above✅

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Biology Chapter 14 support and location solved mcqs

1. Any change in the external environment to which a plant react is called:

(a) Response    

(b) stimulus✅

(c) Tropism    

(d) Tactic

2. Free movements in response to external stimuli are called

(a) Tropic movements

(b) Nastic movements

(c) Tactic movements✅

(d) Autonomic

3. Drooping of leaves and leaflets in touch are not plants are:

(a) Growth movement

(b) Turgor movement✅

(c) Tactic movements

(d) Tropic movements

4. Movements in response to variation in temperature or light intensity are called

(a) Phototropic movements

(b) Nastic movement✅

(c) Tactic movements

(d) Geotropic

5. Locomotary organ of amoeba is:

(a) Cilia

(b) Flagella

(c) Pseudopodic✅

(d) None

6. Bones are held together by:

(a) Tendon    

(b) Ligaments

(c) Joints    

(d) All of those✅

7. Which muscle are under the conscious control of man:

(a) Cardiac muscles    

(b) Smooth muscles

(c) Skeletal muscles✅

(d) All of them

8. The function of skeleton is:

(a) Support    

(b) Protection

(c) Movement    

(d) All above✅

9. The example of movements at cellular level are:

(a) Cytoplasmic streaming 

(b) Motility of egg

(c) Motility of gametes  

(d) a and c✅

10. Supporting tissues for woody dicotyledonous stem are:

(a) wood   

(b) bark

(c) both a and b    

(d) Vascular bundle✅

11. Which of the joint pairs allow movements in all directions:

(a) Shoulder and knee joints

(b) Hip and elbow joints

(c) Hip and shoulder joints✅

(d) Elbow and knee joints

12. Which organism moves by means of pseudopodia:

(a) Paramecium    

(b) Euglena

(c) Amoeba✅

(d) Volvox

13. Rotation and forward movements of euglena is mostly due to:

(a) Cilia    

(b) Flagella

(c) Cillium    

(d) Flagellum✅

14. Response of living organisms towards or away from stimuli is called:

(a) locomotion    

(b) movement✅

(c) Static    

(d) a and b

15. Movement of whole organism from one place to another, under the influence of stimulus is called

(a) Movement    

(b) Locomotion✅

(c) Walking    

(d) All above

16. Muscles are attached with bones of skeleton with the help of:

(a) Ligaments    

(b) Collagen fibers

(c) Tendons✅

(d) Cartilage

17. Two types of exoskeleton in man are:

(a) Axial skeleton    

(b) Rigid skeleton

(c) appendicular skeleton 

(d) a and c✅

18. Hinge joints allow movements in:

(a) One direction✅

(b) Two direction

(c) Three direction    

(d) All directions

19. Parallel bones of joints are held together by:

(a) Ligaments✅

(b) Tendons

(c) Elastic fibres

(d) rigid fibres

20. Simultaneous action of flagella of all the cells of colony is responsible for the motion of:

(a) Paramecium

(b) Volvox colony✅

(c) a and b

(d) none of these

21. Auxin are produced by ______ parts of the plants in:

(a) Leaves    

(b) Soft stem

(c) Apices of root and shoot✅

(d) All of these

22. The medullary rays or pith rays are involved in:

(a) Transport of sap    

(b) Horizontal transport of food✅

(c) Strength of stem    

(d) b and c

23. The point of attachment of muscle to bones, which is immovable is called:

(a) Insertion

(b) Medium

(c) Origin✅

(d) None

24. When the angle between uniting bones is increasing this motion is called:  

(a) Flexion

(b) Extension✅

(c) Antagonism

(d) None

25. Antagonistic part of muscles in the forearm consists of:  

(a) Trap and pectorates    

(b) Tricep and bicep✅

(c) Extension and radials    

(d) None of these  

26. The stimulus for hydrotropism movement is:  

(a) light    

(b) temperature  

(c) Water✅

(d) gravity  

27. The displacement of one or more bones at a joint is called:  

(a) Arthritis    

(b) dislocation of joints✅

(c) Osteoarthritis    

(d) None of these  

28. The swelling and deformation of joints due to break down of covering cartilage is called:  

(a) Osteomalacia    

(b) Arthritis  

(c) Osteoarthritis✅

(d) All above  

29. Biceps and triceps brings about the bending and straightening of the arm, which is called:

(a) Coherent movements  

(b) Antagonistic movement✅

(c) a and b  

(d) None  

30. Ball and socket joints of shoulder and hip allow movement in direction:  

(a) Forward and backward    

(b) Sideways  

(c) a and b✅

(d) All of these  

31. Lines radiating from the centre to the outside of the wood are called:

(a) Medullary rays✅

(b) Fibre fibres  

(c) Water canals    

(d) All of these  

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Biology chapter 13 Excretion Solved mcqs

1. The chemical activities which build complex substances from simpler ones are called:

(a) Anabolic activities✅

(b) catabolic activities

(c) Respiration

(d) Metabolism

2. The excess water in plant is removed by the process of:

(a) Guttation

(b) Transpiration

(c) Respiration

(d) both (a) and (b)✅

3. The bulb like cells with flagella, in planaria is called:

(a) flame cells✅

(b) Mast cells

(c) Plasma cells

(d) Nephridium

4. Each rephridium opens to the exterior by an opening called

(a) Wephrostome

(b) Nephridiophore✅

(c) Bladder

(d) Stoma

5. Organs in insects for excretion of unwanted materials are,

(a) Lymph

(b) Blood

(c) Haemolymph✅

(d) All above

6. In vertebrates, waste products are:

(a) Carbon dioxide, mineral salts

(b) Urea, Uric acid

(c) Excess water, bile pigments

(d) a and c✅

7. In mammals sweat glands produce sweat for

(a) Cooling the body

(b) Excretion of some materials

(c) Removal of excess water

(d) All above✅

8. The ureter from both sides open into the

(a) Urethra

(b) Bladder✅

(c) Pelvis

(d) None

9. Each mammalian kidney is composed of large number of

(a) Nephrons✅

(b) Neurons

(c) Malphigian Tubules

(d) All above

10. The cup shaped portion of nephron is called:

(a) Bowman's capsule✅

(b) Convoluted capsule

(c) Glomerulus

(d) None

11. Renal filterate is collected first in the:

(a) Renal corpuscle

(b) Renal peluis

(c) Renal depression

(d) Bowman's capsule✅

12. Thirst Centre is in:-

(a) Thalamus

(b) Hypothalamus✅

(c) Ventricles

(d) Loop of Henle

13. The important functions of kidney are:

(a) formation of urine

(b) osmogulation

(c) Acid base regulation

(d) All above✅

14. In amoeba ammonia diffuses out through:

(a) Cell membrane✅

(b) Cell wall

(c) Mitochondrion

(d) Golgi bodies

15. No. of nephridia in each segment of earth worm are

(a) Two✅

(b) Three

(c) Four

(d) One

16. The salt excreted in sweat is

(a) Calcium oxalate

(b) Sodium chloride✅

(c) Potassium chloride

(d) Iron sulphide

17. The depression in the centre of the concave side of the kidney is called:

(a) Loop of henle

(b) Ureter

(c) Renal pelvis

(d) hilus✅

18. Nephron consists of:

(a) Renal carpusele

(b) Renal tubules

(c) Both (a) and (b)✅

(d) None above

19. The access oxygen, in plants, is released through

(a) Lenticels

(b) Stomata

(c) Margins

(d) All above✅

20. The removal of excess water in plants take place by:

(a) Transpiration

(b) Guttation

(c) Both (a) and (b)✅

(d) None of these

21. Gums are secreted by:

(a) Rubber

(b) Pines

(c) Acacia✅

(d) None

22. The principle waste products produced in animals are:

(a) Water

(b) Nitrogenous waste

(c) Carbon dioxide

(d) All above✅

23. Nitrogenous wastes include:

(a) Amonia

(b) Uric acid and urea

(c) Both (a) and (b)✅

(d) None

24. Amino acids are broken down into ammonia by the process of:

(a) Deamination✅

(b) Catabolism

(c) Anabolism

(d) b and c

25. Urea is the principle nitrogenous waste products in:

(a) Reptiles

(b) Catabolism

(c) Anabolism

(d) b and c✅

26. In amoeba contractile vacuoles are involved in the removal of:

(a) Excess water✅

(b) Undigested food

(c) CO2 gas

(d) None

27. Following have no special excretory organs:

(a) Amoeba

(b) Paramecium

(c) Euglena

(d) All above✅

28. The process by which the metabolic waste products and toxic materials are removed is called:

(a) Excretion✅

(b) Secretion

(c) Digestion

(d) None above

29. Aquatic animals excrete nitrogenous wastes in the form of:

(a) Nitric acid

(b) HCI

(c) Uric acid

(d) Ammonia✅

30. Nephridium is the excretory organ of:

(a) Hydra

(b) Planaria

(c) Cockroach

(d) Sathworm✅

31. Each nephron is:

(a) Blind at one end✅

(b) Blind at both ends

(c) Open at both ends

(d) None of these

32. The blood enters the glomerulus through:

(a) Afferent vessel✅

(b) Efferent vessel

(c) Renal vein

(d) All of these

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Biology chapter 12 Transport in organisms mcqs solved

41. The circulating system of man comprises of:

(a) Blood

(b) Pumping heart

(c) Arteries and veins

(d) All above✅

42. The circulatory sytem is of types

(a) Open circulatory system

(b) Closed circulatory type

(c) Both (a) and (b)✅

(d) All above

43. A normal adult has how many litres of blood.

(a) Six to seven✅

(b) Five

(c) Three

(d) Ten litres

44. The blood composed of:

(a) Plasma

(b) Blood cells

(c) Both (a) and (b)✅

(d) None above

45: The liquid part of the blood is called:

(a) Plasma✅

(b) Cells

(c) (a) and (b)

(d) All above

46. Amount of proteins in plasma is:

(a) 7%

(b) 7-8%✅

(c) 10%

(d) 6%

47. Fibrinogen helps in:

(a) Bleeding

(b) Blood clotting✅

(c) Blood forming

(d) Blood lysis

48. Blood cells constitute:

(a) 50%

(b) 45% ✅

(c) 60%

(d) 40%

49. Blood cells are of how types.

(a) Two

(b) Three✅

(c) Four

(d) Five

50. Following are blood cells:

(a) W.B.C.

(b) R.B.C.

(c) Platelets

(d) Proteins✅

51. R.B.C. contains special types of proteins called:

(a) Haemoglobin✅

(b) Fibrin

(c) Fibrinogen

(d) Androgen

52. One cubic millimetre of blood contain R.B.C's

(a) 5 lacs

(b) 5 million✅

(c) 5 billion

(d) 5 crore

53. The life span of R.B.C. is:

(a) 8 days

(b) 120 days✅

(c) 100 days

(d) 200 days

54. R.C.B.'s are:

(a) Spherical

(b) Biconcave

(c) Without a nucleolus

(d) All above✅

55. In one cubic mm of blood there are________WBCs.

(a) 1 million

(b) 6,000-8,000✅

(c) 10,000

(d) 10,000

56. Following are the types of W.B.C.'s

(a) Neutrophiles

(b) Eisinophils and basophiles

(c) Monocytes

(d) All above✅

57. Which are disc shaped and without nuclei

(a) Platelets✅

(b) W.B.C.

(c) R.B.C's

(d) Basophils

58. One cubic millimeter of blood contains about cell:

(a) 250,000-600,000✅

(b) One million

(c) Two million

(d) 1 crore

59. The life span of platelets is:

(a) six days✅

(b) Ten days

(c) four days

(d) 120 days

60. Platelets helps in:

(a) Blood clotting✅

(b) Blood lysis

(c) Blood forming

(d) Blood movement

61. Following is/are the functions of blood:

(a) Transportation

(b) Regulation of body temp.

(c) Defence against diseases

(d) All above✅

62. The vessels which carry blood away from heart are called:

(a) Veins

(b) Arteries✅

(c) Capillaries

(d) All above

63. The vessels which carry blood into the heart are called:

(a) Veins✅

(c) Capillaries

(b) Arteries

(d) All above

64. The human heart is divided into how many chambers:

(a) Four✅

(b) Two

(c) Three

(d) Five

65. The force of blood against the walls of blood vessels is called:

(a) Blood force

(b) Blood pressure✅

(c) Tension

(d) Hypertension

66. Which group of blood is universal donor:

(a) O group✅

(b) AB group

(c) A +

(d) B+

67. Which group of blood is universal recipient:

(a) O group

(b) AB group✅

(c) A+

(d) B+

68. The state in which hemoglobin level is below normal is called:

(a) Anemia✅

(b) Polycythemia

(c) Harmophilia

(d) Thalesemia

69. The disease in which the blood fails to clot after injury is called:

(a) Anaemia

(b) Polycythemia

(c) Thalesemia

(d) Haemophilia✅

70. The symptoms of angina pectoris is:

(a) Pain in the centre of the chest

(b) Moving pain in the left arm and shoulder

(c) Both (a) and (b) ✅

(d) None

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Biology chapter 12 Transport in organisms Past paper solved mcqs

 21. The cell sap is a solution of:

(a) Water

(b) Salts

(c) Sugars

(d) All above✅

22. The membrane of the vacuole is called:

(a) Cell membrane

(b) Vacuole membrane

(c) Tonoplast✅

(d) Nuclear membrane

23. Wilting occurs as a result of:

(a) Plasmolysis

(b) Loss of turgidity

(c) Both (a) and (b)✅

(d) None above

24. In plants vascular styem is present in

(a) Flowering plants✅

(b) None-flowering plants

(c) Bryophytes

(d) All plants

25. The rising of soil solution from the bottom to the top of a plant through xylum is called

(a) Rising

(b) Ascent of sap✅

(c) Descent of safe

(d) Ascent of safe

26. Dixon and Jolly presented the theory.

(a) Cohesion tension theory✅

(b) Cell theory

(c) Both (a) & (b)

(d) None

27. One of the causes of ascent of sap is:

(a) Transpiration pull✅

(b) Osmosis

(c) Diffusion

(d) All above

28. The suction force developed as a result of transpiration is called

(a) Function

(b) Transpiration pull✅

(c) Respiration pull

(d) Transportation pull

29. The food manufactured in leaves is transported in the phloem for:

(a) Use

(b) Execution

(c) Storage

(d) (a), and (c)✅

30. Leaves make the food in the form of:

(a) Proteins

(b) Lipids

(c) Carbohydrates✅

(d) All above

31. Food in plant is stored in the form of.

(a) Glucose

(b) Sucrose

(c) Starch✅

(d) All above

32. Plants store carbohydrates in:

(a) Roots

(b) Stem

(c) Leaves

(d) All above✅

33. Fruits and seeds stores:

(a) Carbohydrates

(b) Proteins

(c) Fats

(d) All above✅

34. The evaporation of water from the aerial parts of a plant mainly through stomata is called:

(a) Expiration

(b) Transpiration✅

(c) Execution

(d) All above

35. The small pores distributed over the surface of leaves and young stem is called

(a) Poles

(b) Stomatas✅

(c) Adidas

(d) Patatas

36. Each pole of stomata is guarded by two cells called:

(a) Stomata cells

(b) Guard cells✅

(c) Pole cells

(d) All above

37. 90% loss of water in transpiration occur through

(a) Lenticels

(b) Stomata✅

(c) Cell surfaces

(d) Diffusion

38. 5-10% transpiration occur through:

(a) Cuticles or lenticels✅

(b) Stomata

(c) Surfaces

(d) Stem

39. Following are factors affecting transpiration,

(a) Light

(b) temperature

(c) Humidity

(d) All above✅

40. The drooping of leaves and greens tender stem of a plant as a result of excessive evaporation is called:

(a) Wilting✅

(b) Welding

(c) Melting

(d) Drying

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Biology chapter 12 Transport in organisms solved mcqs

1. The movement of substances from one part to another part within the body of living organisms is called:

(a) Movement

(b) Transaction

(c) Transport✅

(d) All above

2. The waste products diffuses outward through the:

(a) Cell membrane✅

(b) Nuclear membrane

(c) Both a and b

(d) None above

3. In flowering plants which system is responsible for transport of materials:

(a) Muscular system

(b) Vascular system✅

(c) Arterial system

(d) Venous system

4. Vascular system consists of:

(a) Xylum

(b) Phloem

(c) Both a and b✅

(d) None above

5. Which vessel transport water and dissolved substance:

(a) Xylum✅

(b) Phloèm

(c) Both a and b

(d) None

6. Which transport food:

(a) Xylum

(b) Phloem✅

(c) Both a and b 

(d) None

7. In protoplasm, water quantity is:

(a) 70%

(b) 95%

(c) 70-95%✅

(d) 60%

8. Which acts as a medium for transport of mineral.

(a) Water✅

(b) Oil

(c) Xylum

(d) Phloem

9. how many processes (Cansport of material in plant is brought about by

(a) Two✅

(b) Three

(c) Four

(d) One

10. The movement of the materials across the cell membrane without expenditure of energy is called

(a) Active transport

(b) facilitated transport

(c) Passive transport✅

(d) All

11. The movement of molecules/ions from a region of its higher concentration to a region of its lower concentration is called:

(a) Effusion

(b) Diffusion✅

(c) Osmosis

(d) All above

12. Transpiration is an example of:

(a) Osmosis

(b) Diffusion✅

(c) Plasmolysis

(d) None

13. Breathing is an example of:

(a) Osmosis

(b) Diffusion✅

(c) Transpiration

(d) Effusion

14. The diffusion of solvent through a semi permeable membrane is called

(a) simple diffusion

(b) Osmosis✅

(c) Effusion

(d) Transport

15. When a cell absorb water, it swells and become

(a) Lysed

(b) Turgid✅

(c) Shrints

(d) None

16. The shrinkage of protoplasm due to loss of water is called

(a) Plasmolysis✅

(b) Bursting

(c) Shrinkage

(d) None above

17. The movement of substances across a cell membrane against concentration gradient with the help of energy is called:

(a) Transport

(b) Passive transport✅

(c) Active Transport

(d) Facilitated transport

18. The cell membrane is:

(a) Living

(b) None living

(c) Semi permeable

(d) Both (a) and (c)✅

19. Cell membrane consists of:

(a) Protein

(b) Lipids

(c) Carbohydrates

(d) Both (a) and (b)✅

20. The cell wall is:

(a) Living

(b) None living✅

(c) Both (a) and (b)

(d) None

21. The cell sap is a solution of:

(a) Water

(b) Salts

(c) Sugars

(d) All above✅

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Biology chapter No 11 Homestasis solved mcqs

1. Which of the following are the components of homeostatic mechanism:

a. receptors, regulators, effectors

b. receptors, integrators, effectors

c. sensors, brain, effectors

d. all of these✅

2. In case of over-heating, the body temperature is regulated by ______?

a. more sweating and more urination

b. more sweating and less urination✅

c. less sweating and more urination

d. less sweating and less urination

3. An animal that warms itself mainly by absorbing heat from its surrounding is known as ______?

a. homeotherm

b. ectotherm✅

c. endotherm

d. none of them

4. Which of the following animals is not endothermic?

a. salamander✅

b. great white shark

c. polar bear

d. butterfly

5. The birds excrete ______?

a. ammonia

b. urea

c. uric acid✅

d. acetic acid

6. Each kidney of a human being is weighing about ______ grams?

a. 140

b. 150

c. 130

d. 150✅

7. Which of the following represent the bile pigments?

a. bilirubin

b. biliverdin

c. hemoglobin

d. both a and b✅

8. Kidney health is described in terms of ______?

a. the number of kidney stones

b. rate of filtration✅

c. water retention

d. blood clot

9. Why is there no glucose present in the filtrate in the distal tubule of nephron?

a. its molecules are too large to pass across the basement membrane

b. it is removed by osmosis from the tubule

c. it is passively absorbed by the cell lining the descending loop of Henle

d. it is actively absorbed by the proximal tubule cells✅

10. Shifts in water-solute balance are managed primarily by ______?

a. respiratory system

b. urinary system

c. endocrine adjustments✅

d. circulatory system

11. Which is the most important mechanism for water loss from the body?

a. excretion in urine✅

b. sneezing

c. sweating

d. elimination in feces

12. The least toxic excretory product is:

a. ammonia

b. urea

c. uric acid✅

d. fatty acid

13. Malpighian tubules convert nitrogenous waste into:

a. urine

b. ammonia

c. uric acid✅

d. urea

14. The number of cortical nephrons are ______?

a. 70 to 80%✅

b. 80 to 90%

c. 60 to 70%

d. 60 to 80%

15. The major and immediate nitrogenous waste product of protein metabolism is:

a. urea

b. uric acid

c. creatinine

d. ammonia✅

16. Which of the following is a homeothermic animal?

a. uromastyx

b. salamander

c. sea horse

d. kangaroo✅

17. Lithotripsy is a technique to:

a. remove kidney stones without surgery✅

b. remove kidney stone with surgery

c. treat kidney with medicines

d. remove appendix

18. The glucose is reabsorbed by the:

a. proximal convoluted tubule of nephron✅

b. distal convoluted tubule of nephron

c. glomerulus

d. Bowman’s capsule

19. When the kidney fails to form urine the condition is called:

a. nephritis

b. nephrosis

c. ptosis

d. anuria✅

20. Which of the following is isotonic to the surrounding sea water ?

a. bony fishes

b. shark

c. hag fish

d. both b and c✅

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Chapter No 10 Gases exchange solved mcqs

1. Myoglobin is found in:

a. bone

b. connective tissues

c. muscles✅

d. cartilage

2. B.C.G vaccines are usually given to: 

a. children✅

b. adults

c. special persons

d. all of these

3. Myoglobin combines with: 

a. four oxygen molecules

b. three oxygen molecules

c. two oxygen molecules

d. one oxygen molecule✅

4. The oxygen-carrying capacity of hemoglobin in humans when the blood is 100% oxygenated is:

a. 19.4 ml

b. 19.6 ml

c. 20 ml✅

d. 21 ml

5. Which of the following ions play an important role in the transport of carbon dioxide? 

a. sodium

b. potassium

c. bicarbonate✅

d. chloride

6. Percentage of CO2 carried by plasma is:

a. 5%

b. 6%

c. 7%✅

d. 8%

7. The process responsible for energy production in animals is:

a. photosynthesis

b. digestion

c. respiration✅

d. circulation

8. Amount of O2 carried by red blood cells is:

a. 77%

b. 90%

c. 87%

d. 97%✅

9. Smaller is the animal, ______? 

a. more is the rate of respiration✅

b. less is the rate of respiration

c. no effect of size on the rate of respiration

d. none

10. If the lateral side of the grasshopper is covered with wax, the system is affected more? 

a. digestive

b. circulatory

c. respiratory✅

d. excretory

11. In hydra, planaria, and earthworm, the exchange of gases occurs through: 

a. lungs

b. gills

c. trachea

d. body surface✅

12. Otitis media is an inflammation of which part of the body? 

a. Brain

b. Middle ear✅

c. Lungs

d. Urinary tract

13. Of 100ml of arterial blood, oxygen provided to the tissue is:

a. 2 ml

b. 3 ml

c. 4 ml

d. 5 ml✅

14. Expiratory center in medulla is? 

a. Dorsal✅

b. Ventral

c. Lower part

d. All of the above

15. The center of porphyrine in the head region of hemoglobin is occupied by: 

a. Potassium

b. Sodium

c. Magnesium

d. Iron✅

16. The alveoli represent the total surface area of:

a. 10-30m²

b. 30-60m²

c. 70-90m²✅

d. 90-110m²

17. Following nasal passages are made of cartilage except: Chapter No 10 Gases exchange

1. Myoglobin is found in:

a. bone

b. connective tissues

c. muscles✅

d. cartilage

2. B.C.G vaccines are usually given to: 

a. children✅

b. adults

c. special persons

d. all of these

3. Myoglobin combines with: 

a. four oxygen molecules

b. three oxygen molecules

c. two oxygen molecules

d. one oxygen molecule✅

4. The oxygen-carrying capacity of hemoglobin in humans when the blood is 100% oxygenated is:

a. 19.4 ml

b. 19.6 ml

c. 20 ml✅

d. 21 ml

5. Which of the following ions play an important role in the transport of carbon dioxide? 

a. sodium

b. potassium

c. bicarbonate✅

d. chloride

6. Percentage of CO2 carried by plasma is:

a. 5%

b. 6%

c. 7%✅

d. 8%

7. The process responsible for energy production in animals is:

a. photosynthesis

b. digestion

c. respiration✅

d. circulation

8. Amount of O2 carried by red blood cells is:

a. 77%

b. 90%

c. 87%

d. 97%✅

9. Smaller is the animal, ______? 

a. more is the rate of respiration✅

b. less is the rate of respiration

c. no effect of size on the rate of respiration

d. none

10. If the lateral side of the grasshopper is covered with wax, the system is affected more? 

a. digestive

b. circulatory

c. respiratory✅

d. excretory

11. In hydra, planaria, and earthworm, the exchange of gases occurs through: 

a. lungs

b. gills

c. trachea

d. body surface✅

12. Otitis media is an inflammation of which part of the body? 

a. Brain

b. Middle ear✅

c. Lungs

d. Urinary tract

13. Of 100ml of arterial blood, oxygen provided to the tissue is:

a. 2 ml

b. 3 ml

c. 4 ml

d. 5 ml✅

14. Expiratory center in medulla is? 

a. Dorsal✅

b. Ventral

c. Lower part

d. All of the above

15. The center of porphyrine in the head region of hemoglobin is occupied by: 

a. Potassium

b. Sodium

c. Magnesium

d. Iron✅

16. The alveoli represent the total surface area of:

a. 10-30m²

b. 30-60m²

c. 70-90m²✅

d. 90-110m²

17. Following nasal passages are made of cartilage except: 

a. trachea

b. bronchus

c. bronchioles✅

d. tracheoles

18. Following nasal passages are made of cartilage except: 

a. trachea

b. bronchus

c. bronchioles✅

d. tracheoles

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