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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