NEETBotanyPlant - Growth and Development
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Abscisic acid (ABA) is broadly considered to act as an antagonist to Gibberellic acids (GAs). Reason (R): ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses. In the light of the above statements, choose the correct answer from t
Options
- ABoth Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A)
- BBoth Assertion (A) and Reason (R) are correct but Reason (R) is not the correct explanation of Assertion (A)
- CAssertion (A) is correct but Reason (R) is not correct
- DAssertion (A) is not correct but Reason (R) is correct
Correct answer
B. Both Assertion (A) and Reason (R) are correct but Reason (R) is not the correct explanation of Assertion (A)
Step-by-step solution
Assertion (A) is correct because Abscisic acid (ABA) acts as an antagonist to GAs. For example, ABA induces seed dormancy and inhibits germination, whereas GAs break seed dormancy and promote germination. Reason (R) is also correct because ABA is known as the stress hormone; it stimulates the closure of stomata and increases plant tolerance to various stresses. However, Reason (R) is not the correct explanation for Assertion (A). The antagonistic relationship between ABA and GAs is primarily based on their opposing