Select incorrect statement with respect to pteridophytes :-

Options

A. In heterosporous pteridophytes gametophyte is not known as prothallus
B. Salvinia, Marsilea, and Azolla are heterosporous pteridophytes
C. In all pteridophytes prothallus is photosynthetic
D. Most of the pteriodophytes are homosporous

Answer

**Step-by-Step Solution:**

1. **Understanding Pteridophytes**: Pteridophytes are a group of vascular plants that reproduce via spores and do not produce seeds. They include ferns, horsetails, and clubmosses.

2. **Analyzing the Statements**:
- **Statement 1**: "In heterosporous pteridophytes, the gametophyte is known as prothallus."
- This statement is incorrect because in heterosporous pteridophytes, the gametophyte is indeed referred to as prothallus.
- **Statement 2**: "Salvinia, Marsilea, and Azolla are heterosporous pteridophytes."
- This statement is correct. These plants produce two types of spores: macrospores and microspores.
- **Statement 3**: "In pteridophytes, prothallus is photosynthetic."
- This statement is also correct. The prothallus is green, free-living, and photosynthetic.
- **Statement 4**: "Most of the pteridophytes are homosporous."
- This statement is correct. Most pteridophytes produce only one type of spore, while a few, like Salvinia, Marsilea, and Azolla, are heterosporous.

3. **Identifying the Incorrect Statement**:
- After analyzing all the statements, it is clear that Statement 1 is the only incorrect statement regarding pteridophytes.

4. **Conclusion**: The answer to the question is that the incorrect statement with respect to pteridophytes is Statement 1.

**Final Answer**: Option 1 is the incorrect statement.

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