Which of the following non angiosperm plants have vessel?

Options

A. Gnetum
B. welwitschia
C. ephedra
D. all of the above

Answer

To answer the question "Which of the following non-angiosperm plants have vessels?", we need to understand the characteristics of plant groups and the presence of vessels in them.

### Step-by-Step Solution:

1. **Understand the Types of Plants**:
- Plants are broadly classified into two groups: angiosperms (flowering plants) and non-angiosperms (non-flowering plants). Non-angiosperms include gymnosperms, ferns, and other primitive plants.

2. **Identify the Presence of Vessels**:
- Vessels are specialized structures for water conduction found primarily in angiosperms. However, some non-angiosperm plants, particularly certain gymnosperms, also possess vessels.

3. **Focus on Non-Angiosperm Groups**:
- Gymnosperms (like conifers) are the main group of non-angiosperms that can have vessels. While many gymnosperms primarily have tracheids (a type of water-conducting cell), some species, such as Gnetum and Welwitschia, do have vessels.

4. **Conclusion**:
- The non-angiosperm plants that have vessels are primarily found in the gymnosperm group, specifically in some genera like Gnetum and Welwitschia.

### Final Answer:
Non-angiosperm plants that have vessels include certain gymnosperms, specifically Gnetum and Welwitschia.