Plant body is differentiated in hold fast, stipe and frond in 

Options

A. Ulva
B. Laminaria
C. Oedogonium
D. Acetabularia

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which plant body is differentiated into holdfast, stipe, and frond.

2. **Identifying Key Terms**:
- **Holdfast**: A structure that anchors the plant to a substrate.
- **Stipe**: A stalk-like structure that connects the holdfast to the frond.
- **Frond**: The leaf-like part of the plant that is involved in photosynthesis.

3. **Analyzing the Options**:
- **Alva**: This is not a recognized group in the context of plant body differentiation.
- **Laminaria**: This is a type of brown algae (Phaeophyceae) known for having a differentiated plant body.
- **Eudogonium**: This is a type of green algae (Chlorophyceae) and does not have the same structure as described.
- **Acetabularia**: Another type of green algae that does not fit the criteria.

4. **Identifying the Correct Group**: The question specifies that the plant body is differentiated into holdfast, stipe, and frond, which is characteristic of brown algae (Phaeophyceae).

5. **Conclusion**: The correct answer is **Laminaria**, which is an example of brown algae that exhibits this differentiation.

**Final Answer**: The plant body is differentiated into holdfast, stipe, and frond in **Laminaria** (brown algae).

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