Question

Which of the following is a plant hormone?

• A. Thyroxin
• B. Insulin
• C. Cytokinin
• D. Oestrogen

Hint:

Major plant hormones include Auxin, Gibberellin, Cytokinin, Abscisic acid, and Ethylene.

Answer 1

The Correct Option is C

Step 1: Recall the concept of hormones.
Plant hormones are naturally occurring chemical substances that regulate growth, development, and various physiological processes in plants.
Step 2: Analyze each option.
- (A) Thyroxin → Animal hormone secreted by thyroid gland.
- (B) Insulin → Animal hormone that regulates blood sugar.
- (C) Cytokinin → Plant hormone that promotes cell division, tissue growth, and delays leaf senescence.
- (D) Oestrogen → Female sex hormone in animals.
Step 3: Conclusion.
Thus, the plant hormone among the given options is Cytokinin.