Pteridophytes are divided into how many classes?

Options

A. Two
B. Three
C. Four
D. Six

Answer

### Step-by-Step Solution:

1. **Understanding Pteridophytes**:
- Pteridophytes are vascular plants that reproduce via spores and do not produce seeds. They have a well-defined structure consisting of roots, stems, and leaves.

2. **Classification of Pteridophytes**:
- Pteridophytes are classified into different classes based on their characteristics and evolutionary traits.

3. **Identifying the Classes**:
- Pteridophytes are divided into four main classes:
- **Psilopsida**: This class includes the simplest living vascular plants, known as whisk ferns.
- **Lycopsida**: This class includes clubmosses and quillworts, which are characterized by their small, scale-like leaves.
- **Sphenopsida**: This class includes horsetails, which have jointed stems and whorled leaves.
- **Pteropsida**: This class includes true ferns, which are the most diverse group of pteridophytes.

4. **Conclusion**:
- Therefore, the answer to the question is that pteridophytes are divided into **four classes**.

### Final Answer:
Pteridophytes are divided into **four classes**.

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