Free Plant Growth And Development (Daily Quiz: 1) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Assertion :
2, 4-D is extensively used in agricultural and horticultural practices.
Reason :
2, 4-D is a herbicide.

(a) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

(b) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

(c) If Assertion is true but Reason is false.

(d) If both Assertion and Reason are false.

Question-2

Mimosa pudica (Sensitive plant) leaf's movement due to :

(a) Delicate leaves

(b) Nerve impulsion

(c) Loss of tissue

(d) Turgor change in leaf base

Question-3

Sprouting of potato tubers is initiated by which of the following PGR?

(a) Ethylene

(b) Cytokinin

(c) Both (a) and (b)

(d) None of these

Question-4

Experiments done by Charles Darwin and his son on plant phototropism showed that

(a) The tip of the coleoptile is the light receptor of the plant.

(b) Auxin is produced in the tip of the coleoptile.

(c) Within coleoptiles, auxin moves laterally away from the source of the light.

(d) More cell elongation takes place on the shaded side of the plant.

Question-5

Photoperiodism was first characterized in

(a) Potato

(b) Tobacco

(c) Tomato

(d) Cotton