Shoot spical meristem occurs over the tip of

Options

A. Root
B. Radicle
C. Plumule
D. Mesocotyl

Answer

**Step-by-Step Solution:**

1. **Understanding Shoot Apical Meristem (SAM):**
- The shoot apical meristem (SAM) is a region of actively dividing cells located at the tip of the shoot. It is responsible for the growth of stems and leaves.

2. **Identifying Plant Parts:**
- When a seed germinates, it develops two main parts: the root part (known as the radical) and the shoot part (known as the plumule).
- The radical grows downward into the soil, while the plumule grows upward above the soil.

3. **Locating the SAM:**
- The shoot apical meristem is specifically located at the tip of the plumule, which is the part of the plant that will develop into the stem and leaves.

4. **Evaluating the Options:**
- Option 1: Root - This is incorrect because the root is part of the radical, not where the shoot apical meristem occurs.
- Option 2: Radical - This is also incorrect for the same reason as the root; it does not contain the shoot apical meristem.
- Option 3: Plumule - This is correct because the shoot apical meristem is located at the tip of the plumule.
- Option 4: Mesocotyl - This is incorrect as the mesocotyl is the first internode of the plant and does not contain the shoot apical meristem.

5. **Conclusion:**
- The shoot apical meristem occurs at the tip of the plumule.

**Final Answer:**
The shoot apical meristem occurs over the tip of the plumule.

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