physiology of plants, humans and animals - Category wise Question and Answer Practice Test with Solutions

Question : 26

Appearance of facial hairs in a woman may be due to the effect of

a) ultraviolet radiation

b) temperature

c) hormone

d) pollution

Question : 27 [UPRO/ARO (Pre) 2014]

Consider the following statements.
Assertion (A):
During sleep, bright light is undesirable.
Reason (R):
In bright light, production of melatonin in the body is considerably increased.
Select your answer using the codes given below.
Code

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Question : 28

Other function performed by kidney apart from excretion is

a) Temperature regulation

b) Osmoregulation

c) Hormonal regulation

d) Spermatogenesis

Question : 29

Thymosin stimulates

a) erythrocytes

b) milk secretion

c) T-lymphocytes

d) melanocytes

Question : 30

Percentage of oxygen supplied by haemoglobin is

a) 100%

b) 97%

c) 49%

d) 3%