Vegetative propagatation in Pistia is a

Options

A. Underground stem
B. Subaerial stem
C. Underground root
D. Aerial stem

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 plant in question is Pistia, commonly known as water lettuce. It is important to identify the specific type of vegetative propagation it employs.

3. **Examining Different Types of Stems:**
- **Underground Stem:** This includes structures like rhizomes or tubers. However, Pistia does not utilize this method for propagation.
- **Sub-aerial Stem:** This type of stem grows just above the ground level and can produce new plants. In Pistia, this method is utilized for vegetative propagation.
- **Underground Root:** This method is associated with plants like carrots, which have tap roots. Pistia does not propagate this way.
- **Aerial Stem:** This method involves stems that grow above ground and is not the primary method of propagation for Pistia.

4. **Conclusion:**
Based on the analysis, the correct answer is that vegetative propagation in Pistia occurs through sub-aerial stems. These stems can be cut and planted in soil to grow new Pistia plants.

**Final Answer:**
Vegetative propagation in Pistia is through sub-aerial stems.

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