Pteridophytes are classified in to:-

Options

A. Three classes
B. Two classes
C. Four classes
D. Five classes

Answer

**Step-by-Step Solution:**

1. **Understand the Classification of Pteridophytes:**
- Pteridophytes are vascular plants that reproduce via spores and do not produce seeds or flowers. They are classified under the group known as cryptogams, which means their reproductive structures are not visible.

2. **Identify the Classes of Pteridophytes:**
- Pteridophytes are divided into four main classes:
- **1. Scyphopsida:** These are the most primitive vascular plants. They lack true roots and instead have root-like structures called rhizoids. Leaves may or may not be present.
- **2. Lycopsida:** These plants have differentiated roots, stems, and leaves. Their leaves are called microphylls, which do not produce a leaf gap in the vascular strand of the stem.
- **3. Sphenopsida:** Commonly known as horsetails, these plants have stems that are jointed and ribbed, with leaves and branches that grow in whorls.
- **4. Pteropsida:** This class includes ferns, which are typically perennial and have well-differentiated roots, stems, and spirally arranged leaves.

3. **Conclusion:**
- Based on the classification, we can conclude that pteridophytes are classified into four classes: Scyphopsida, Lycopsida, Sphenopsida, and Pteropsida.

4. **Final Answer:**
- Therefore, the correct answer to the question "Pteridophytes are classified into:" is **four classes.**

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