The first process which occurs when the seed is placed in the soil is

Options

A. Photosynthesis
B. Respiration
C. Imbibition
D. Solubilisation of food

Answer

**Step-by-Step Solution:**

1. **Understanding Seed Germination**: When a seed is placed in the soil, it undergoes a series of processes that lead to germination. The first of these processes is crucial for the seed to begin its growth.

2. **Identifying the Initial Process**: The options provided are:
- A) Photosynthesis
- B) Respiration
- C) Imbibation
- D) Solubilization of food

3. **Analyzing Each Option**:
- **Photosynthesis**: This process requires light and occurs after the seed has germinated and the plant has developed leaves. Therefore, it is not the first process.
- **Respiration**: While respiration does occur in seeds, it is not the very first process that initiates germination.
- **Imbibation**: This is the process of water uptake by the seed. When a seed is placed in the soil, it absorbs water, causing it to swell and soften. This is indeed the first process that occurs.
- **Solubilization of food**: This process occurs after imbibation, as the seed begins to utilize stored food for growth.

4. **Conclusion**: The first process that occurs when the seed is placed in the soil is **imbibation**.

5. **Final Answer**: C) Imbibation

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