Question

Which plant hormone is primarily responsible for initiating seed germination and breaking seed dormancy?

• A. Auxin
• B. Gibberellin
• C. Abscisic acid
• D. Cytokinin

Hint:

Remember: Gibberellins break seed dormancy and promote germination, while Abscisic acid induces dormancy.

Answer 1

The Correct Option is B

- Gibberellins promote seed germination by breaking seed dormancy and stimulating enzymes that mobilize stored food in the seed.
- Auxins mainly regulate cell elongation and growth, so (A) is incorrect.
- Abscisic acid (ABA) promotes seed dormancy and inhibits germination, so (C) is incorrect.
- Cytokinins promote cell division and growth but are not directly involved in seed dormancy breaking, so (D) is incorrect.
% Final answer Answer: \(\boxed{\text{B}}\)