Question

Choose the gaseous hormone among the following:

• A. Auxin
• B. Gibberellin
• C. Ethylene
• D. Cytokinin

Hint:

Ethylene is the gaseous plant hormone and is important in fruit ripening.

Answer 1

The Correct Option is C

Concept:
Plant hormones regulate growth, development, flowering, fruit ripening and other physiological processes.

Step 1: Identify gaseous plant hormone.
Ethylene is the only gaseous plant hormone among the commonly known plant hormones. \[ \text{Ethylene} \rightarrow \text{gaseous hormone} \]

Step 2: Function of ethylene.
Ethylene is mainly associated with fruit ripening, senescence and abscission. \[ \text{Ethylene} \rightarrow \text{fruit ripening} \]

Step 3: Compare with other hormones.
Auxin, gibberellin and cytokinin are not gaseous hormones. \[ \therefore \text{Correct Answer is (C)} \]