Which one does not occur in Selaginella?
(a) Heterospory
(b) Heterophylly
(c) Homospory
(d) Ligulate leaves

Options

A. Heterospory
B. Heterophylly
C. Homospory
D. Ligulate leaves.

Answer

To solve the question "Which one does not occur in Selaginella?", we will analyze each option provided:

1. **Understanding Selaginella**:
- Selaginella is a type of pteridophyte, which is a group of vascular plants that reproduce via spores. It is known for its unique reproductive characteristics.

2. **Analyzing the options**:
- **(a) Heterospory**:
- Selaginella exhibits heterospory, meaning it produces two different types of spores: microspores (male) and megaspores (female). This is a characteristic feature of Selaginella.
- **(b) Heterophylly**:
- Heterophylly refers to the presence of different types of leaves on the same plant. Selaginella does show heterophylly, as it can have leaves that vary in shape and size.
- **(c) Homospory**:
- Homospory is the production of only one type of spore. Since Selaginella is known for heterospory, it does not exhibit homospory. Therefore, this option is likely the correct answer.
- **(d) Ligulate leaves**:
- Ligulate leaves are a specific type of leaf structure that can be found in Selaginella. Thus, this option is also present in Selaginella.

3. **Conclusion**:
- Based on the analysis, Selaginella does not exhibit homospory. Therefore, the correct answer to the question is **(c) Homospory**.