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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