Both heterospory and circinate ptyxis occur in

Options

A. Dryopteris
B. Pinus
C. Cycas
D. Funaria.

Answer

To solve the question "Both heterospory and circinate ptyxis occur in," we will analyze the options provided and understand the concepts of heterospory and circinate ptyxis.

### Step-by-Step Solution:

1. **Understanding Heterospory**:
- Heterospory refers to the production of two different types of spores: microspores and megaspores.
- Microspores develop into male gametophytes, while megaspores develop into female gametophytes.

2. **Identifying Heterosporous Plants**:
- Among the options given:
- **A. Dryopteris**: This is a fern and is homosporous, producing only one type of spore.
- **B. Pinus**: This is a gymnosperm and is heterosporous, producing both microspores and megaspores.
- **C. Cycas**: This is also a gymnosperm and is heterosporous, producing both types of spores.
- **D. Funaria**: This is a moss and is homosporous, producing only one type of spore.
- From this analysis, we can conclude that both Pinus and Cycas are heterosporous.

3. **Understanding Circinate Ptyxis**:
- Circinate ptyxis refers to the coiling of young leaves in a specific manner, which is often seen in certain plants during their development.
- This characteristic is typically found in some gymnosperms.

4. **Identifying Plants with Circinate Ptyxis**:
- Among the options:
- **A. Dryopteris**: This fern exhibits circinate ptyxis.
- **B. Pinus**: This gymnosperm does not exhibit circinate ptyxis.
- **C. Cycas**: This gymnosperm exhibits circinate ptyxis.
- **D. Funaria**: This moss does not exhibit circinate ptyxis.
- Therefore, both Cycas and Dryopteris exhibit circinate ptyxis.

5. **Final Conclusion**:
- Since both heterospory and circinate ptyxis occur in Cycas, the correct answer is **C. Cycas**.

### Final Answer:
The answer to the question is **C. Cycas**.