Which one of the following growth regulators is known as the stress hormone?
1. Abscisic acid
2. Ethylene
3. GA3
4. Indole acetic acid
Which one of the following generally acts as an antagonist to Gibberellins?
1. Ethylene
2. ABA
3. IAA
4. Zeatin
Which one of the following acids is a derivative of carotenoids?
1. Indole-butyric acid
2. Indole-3-acetic acid
3. Gibberellic acid
4. Abscisic acid
1. vessels and tracheid differentiation
2. leaf abscission
3. annual plants
4. floral parts.