In seed germination the first to occur is

Options

A. Diffusion
B. Osmosis
C. Imbibition
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding Seed Germination**: Seed germination is the process by which a seed develops into a new plant. It involves several stages, and we need to identify which stage occurs first.

2. **Analyzing the Options**:
- **Diffusion**: This is the movement of molecules from an area of higher concentration to an area of lower concentration. While diffusion does play a role in various biological processes, it is not the first step in seed germination.
- **Osmosis**: This is the movement of water molecules through a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration. Similar to diffusion, osmosis is important but not the initial step in germination.
- **Imbibition**: This is the process where seeds absorb water, causing them to swell and eventually break the seed coat. Imbibition is crucial for initiating the germination process.

3. **Identifying the First Step**: Among the options, imbibition is the first process that occurs during seed germination. It allows the seed to take in water, which is essential for activating metabolic processes that lead to germination.

4. **Conclusion**: Therefore, the first occurrence in seed germination is imbibition.

**Final Answer**: In seed germination, the first process to occur is imbibition.

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