What is site of origin of the new plantlets in the plants multiplying by stems?

Options

A. nodes
B. internodes
C. apex
D. base

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Stem:**
- The stem of a plant consists of various parts, including nodes and internodes.
- Nodes are specific points on the stem where leaves, branches, or flower buds can arise.

2. **Defining Nodes:**
- Nodes are the areas on the stem that serve as the origin for new growth.
- They contain lateral buds, which can develop into new plantlets.

3. **Understanding Internodes:**
- Internodes are the segments of the stem located between two nodes.
- They do not give rise to new plantlets; instead, they provide support and transport nutrients.

4. **Identifying the Apex:**
- The apex refers to the growing tip of the plant, which can be found at the end of the stem (shoot apex) or root (root apex).
- While important for growth, the apex is not the site for the origin of new plantlets.

5. **Understanding the Base:**
- The base is the part of the plant where the stem meets the root.
- Like the apex, it is crucial for the plant's stability and nutrient uptake but does not produce new plantlets.

6. **Conclusion:**
- Based on the definitions and functions of these parts, the correct answer to the question is that the site of origin of new plantlets in plants multiplying by stems is the **nodes**.

**Final Answer: Nodes.**

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