Cycas differs from Pteris in having

Options

A. vessels and tracheids
B. motile sperms
C. pollen tube
D. archegonia

Answer

To answer the question "Cycas differs from Pteris in having," we will analyze the key differences between these two plant groups.

### Step-by-Step Solution:

1. **Identify the Plant Groups**:
- Cycas is a genus of cycads, which are seed-producing plants.
- Pteris is a genus of ferns, which are non-seed producing plants.

2. **Examine the Options**:
- Option A: Vessels and tracheids
- Option B: Motile sperms
- Option C: Pollen tube
- Option D: Archegonia

3. **Analyze the Presence of Motile Sperm**:
- Cycas produces motile sperm, meaning that the sperm can move actively.
- Pteris, on the other hand, produces non-motile sperm, which cannot move on its own.

4. **Evaluate Other Options**:
- **Vessels and Tracheids**: Both Cycas and Pteris have tracheids, but vessels are typically absent in ferns like Pteris.
- **Pollen Tube**: Cycas produces pollen tubes as it is a seed plant, but Pteris does not produce pollen tubes since it reproduces via spores.
- **Archegonia**: Both Cycas and Pteris have archegonia, which are structures that produce eggs.

5. **Conclusion**:
- The main distinguishing feature between Cycas and Pteris is the presence of motile sperm in Cycas and non-motile sperm in Pteris.

Thus, the correct answer is **Option B: Motile sperms**.