What is incorrect for companion cell?

Options

A. It is specialised parenchymatous cell
B. It helps in maintaining the pressure gradient in the sieve tubes
C. It does not retain nucleus throughout the life
D. It is absent in gymnosperms

Answer

To determine the incorrect statement regarding companion cells, let's analyze each option step by step:

1. **Identify the nature of companion cells**:
- Companion cells are specialized parenchymatous cells found in the phloem tissue of angiosperms.
- **Conclusion**: This statement is correct.

2. **Function of companion cells**:
- Companion cells play a role in maintaining the pressure gradient in the sieve tubes, which is essential for the transport of nutrients.
- **Conclusion**: This statement is also correct.

3. **Presence of nucleus in companion cells**:
- Companion cells do retain their nucleus throughout their life. This is a key feature that distinguishes them from sieve tube elements, which lack a nucleus.
- **Conclusion**: This statement is incorrect.

4. **Presence in plant groups**:
- Companion cells are absent in gymnosperms and are specifically found in the phloem of angiosperms.
- **Conclusion**: This statement is correct.

**Final Answer**: The incorrect statement regarding companion cells is that they "do not retain nucleus throughout the life."

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