During seed germination its stored food is mobilised by

Options

A. ABA
B. Gibberellin
C. Ethylene
D. Cytokinin

Answer

**Step-by-Step Solution:**

1. **Understanding Seed Germination**: Seed germination is the process by which a seed develops into a new plant. During this process, the seed utilizes its stored food to support the initial growth of the plant.

2. **Identifying the Term "Mobilized"**: The term "mobilized" refers to the process of making stored nutrients available for use. In the context of seed germination, it means the conversion and transport of stored food reserves to support the growing embryo.

3. **Examining the Options**: The options provided are:
- A) ABA (Abscisic Acid)
- B) Gibberellin
- C) Ethylene
- D) Cytokinin

4. **Role of Gibberellin**: Gibberellin is a plant hormone known for its role in promoting growth. It stimulates the elongation of cells and is crucial during the germination process. Gibberellin helps in breaking down the stored food in the seed, making it available for the developing plant.

5. **Eliminating Other Options**:
- **ABA (Abscisic Acid)**: This hormone generally inhibits growth and promotes seed dormancy, so it does not play a role in mobilizing food during germination.
- **Ethylene**: While it plays a role in fruit ripening and other processes, it is not primarily responsible for mobilizing stored food during germination.
- **Cytokinin**: This hormone promotes cell division and growth but does not directly mobilize stored food in seeds.

6. **Conclusion**: Based on the roles of these hormones, gibberellin is the primary hormone responsible for mobilizing stored food during seed germination.

**Final Answer**: Gibberellin

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