Question

Read the given statements and select the option that is/are incorrect ones.

(i) Cytokinin is primarily concerned with cell division.
(ii) $C_2{H}_4$ breaks seed and bud dormancy.
(iii) ABA stimulates the opening of stomata.
(iv) $C_2{H}_4$ initiates germination in peanut seeds, sprouting of potato tubers.
(v) ABA is synergistic to GA.

• A. (i), (ii) and (iv)
• B. (iii) and (ii)
• C. (iii) and (v)
• D. (iv) and (v)

Answer 1

The correct option is C (iii) and (v)

ABA is regarded as the stress hormone or a growth inhibitor. In conditions of water stress ABA initiates closure of stomata to prevent water loss through transpiration. It is antagonistic to GA as the latter promotes seed germination, while ABA prevents seed germination.

So, the correct answer is ' (iii) and (v)'