| Column I | Column II |
| A. Control of weeds | 1. Gibberellin. |
| B. Induction of germination | 2. Cytokines |
| C. Ripening of fruit | 3. 2,4-D |
| D. Delaying of senescence | 4. Ethylene |
A) A-2 B-4 C-3 D-1
B) A-3 B-1 C-4 D-2
C) A-1 B-2 C-4 D-3
D) A-2 B-3 C-1 D-4
Correct Answer: B
Solution :
Plant growth regulators are the hormones or plant growth substances that are used to control growth and other physiological functions. Out of the growth hormones given in the question, 2,4-D (i.e., 2, 4 dichlorophenoxy acetic acid) is a type of synthetic auxin used to control weeds or eradication of weeds, while, the other such as gibberellin (weakly acid growth hormone) is used in the induction of germination, ethylene (gaseous hormone) is used to ripen fruit thus, known as ripening hormone, and cytokinin (basic in nature) is used to delay senescence (i.e., ageing of leaves and other organs).
You need to login to perform this action.
You will be redirected in
3 sec
