Vegetative propagation in Pistia occurs by

Options

A. stolon
B. offset
C. runner
D. sucker

Answer

**Step-by-Step Solution:**

1. **Understanding Vegetative Propagation:**
- Vegetative propagation is a form of asexual reproduction in plants where new individuals are produced from the vegetative parts of the plant, such as stems, roots, or leaves.

2. **Identifying the Plant in Question:**
- The question specifically asks about Pistia, which is a genus of aquatic plants commonly known as water lettuce.

3. **Analyzing the Options:**
- The options given for vegetative propagation in Pistia are:
a) Stolon
b) Offset
c) Runner
d) Sucker

4. **Defining Each Option:**
- **Stolon (Runner):** A horizontal stem that grows along the ground and can produce new plants at nodes.
- **Offset:** A short lateral branch that develops from the base of the main stem, which can root and grow into a new plant.
- **Runner:** Similar to a stolon, it is a horizontal stem that can produce new plants.
- **Sucker:** A shoot that arises from the base of a plant or from the roots, which can grow into a new plant.

5. **Identifying the Correct Method for Pistia:**
- In the case of Pistia, vegetative propagation occurs primarily through offsets. These are branches that originate from the main stem, where the upper part bears leaves and the lower part develops roots.

6. **Conclusion:**
- Therefore, the correct answer to the question is **offset**.

**Final Answer:**
- Vegetative propagation in Pistia occurs by **offset**.

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