A vessel less piece of stem possessing prominent sieve tubes would belong to

Options

A. Pinus
B. Eucalyptus
C. Grass
D. Trochodendron.

Answer

To solve the question "A vessel less piece of stem possessing prominent sieve tubes would belong to," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Key Terms**:
- "Vessel less" indicates that the plant does not have vessels in its xylem.
- "Prominent sieve tubes" suggests that the plant has well-developed phloem tissue.

2. **Identify Plant Groups**:
- Angiosperms (flowering plants) typically have vessels in their xylem.
- Gymnosperms (like Pinus) also have vessels.
- Some primitive angiosperms, particularly certain dicots, may lack vessels.

3. **Examine the Options**:
- **Pinus**: This is a gymnosperm and has vessels.
- **Eucalyptus**: This is an angiosperm and has vessels.
- **Grass**: This is also an angiosperm and has vessels.
- **Trocodendron**: This is a primitive dicot angiosperm known to lack vessels but has prominent sieve tubes.

4. **Conclusion**:
- Since we are looking for a plant that is vessel-less and has prominent sieve tubes, the correct answer is **Trocodendron**.

### Final Answer:
The vessel-less piece of stem possessing prominent sieve tubes would belong to **Trocodendron**.

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