Ephedar and Gnetum are similar in having

Options

A. Pollination mechanism
B. Double fertilization
C. Winged pollen
D. Heteromorph genes

Answer

To determine the similarity between Ephedra and Gnetum, we need to analyze the provided options related to their reproductive features.

### Step-by-Step Solution:

1. **Identify the Organisms**:
- Ephedra and Gnetum are both part of the group known as Gnetophytes, which are seed plants.

2. **Examine the Options**:
- **Option A: Pollination mechanism**
- **Option B: Double fertilization**
- **Option C: Winged pollen**
- **Option D: Heteromorphic genes**

3. **Analyze Each Option**:
- **Option A (Pollination mechanism)**: Both Ephedra and Gnetum utilize insects for pollination, which indicates they share a similar pollination mechanism.
- **Option B (Double fertilization)**: This process is characteristic of angiosperms (flowering plants) and does not apply to Ephedra and Gnetum.
- **Option C (Winged pollen)**: While some plants have winged pollen, this is not a defining feature of both Ephedra and Gnetum.
- **Option D (Heteromorphic genes)**: This term refers to the presence of different forms of genes, which is not a relevant similarity between these two genera.

4. **Conclusion**:
- The only option that accurately describes a similarity between Ephedra and Gnetum is **Option A: Pollination mechanism**. They both rely on insects for pollination.

### Final Answer:
Ephedra and Gnetum are similar in having **pollination mechanism** (Option A).

---