Question

_________and ________are growth inhibitor hormones.

• A. Ethylene
• B. Abscisic acid

Answer 1

Growth inhibitor hormones:

Ethylene:

1. It inhibits stem elongation.
2. It promotes abscission and senescence.
3. It inhibits the growth of the stem, root, and axillary buds in etiolated plants.
4. It is a gaseous hormone that affects the horizontal growth of seedlings.
5. It plays an important role in fruit ripening.

Abscisic acid:

1. It is a hormone that influences stomatal closure to stop water loss.
2. It regulates abscission and dormancy.
3. It inhibits plant growth and seed germination.

Final answer: Ethylene and Abscisic acid are growth inhibitor hormones.