Which one is homosporous

Options

A. Cycas
B. China Rose
C. Jower
D. Nephrolepis.

Answer

To determine which organism is homosporous among the given options, we need to understand the definitions of homosporous and heterosporous plants.

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Homosporous**: Plants that produce only one type of spore, which develops into a gametophyte that can produce both male and female gametes.
- **Heterosporous**: Plants that produce two different types of spores: microspores (male) and megaspores (female).

2. **Analyze Each Option**:
- **A. Cyclus**: This plant belongs to the Gymnosperms and is known to be heterosporous, producing different types of spores.
- **B. China Rose**: This is an Angiosperm and is also heterosporous, producing different types of gametes.
- **C. Jowar**: Similar to China Rose, Jowar is an Angiosperm and is heterosporous as well.
- **D. Nephrolepis**: This plant is a type of fern and belongs to the Pteridophytes. It is known to be homosporous, producing only one type of spore.

3. **Conclusion**:
- After analyzing all the options, we find that **Nephrolepis (option D)** is the only homosporous plant among the choices provided.

### Final Answer:
The organism that is homosporous is **D. Nephrolepis**.

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