Companion cells are associated with -

Options

A. Sieve cells
B. Sieve tubes
C. Albuminous cells
D. Vessels

Answer

**Step-by-Step Solution:**

1. **Understanding Companion Cells**: Companion cells are specialized cells found in the phloem of flowering plants. They play a crucial role in the transport of nutrients, particularly carbohydrates.

2. **Identifying the Association**: Companion cells are closely associated with sieve tubes. Sieve tubes are part of the phloem tissue responsible for the transport of sugars and other organic nutrients.

3. **Function of Companion Cells**: Companion cells have a nucleus and are vital for the functioning of sieve tubes, which lack a nucleus. They provide the necessary energy and support for the sieve tubes to carry out their function of transporting nutrients.

4. **Connection Between Cells**: Companion cells and sieve tubes are connected through structures called plasmodesmata, which allow for the transfer of substances between them.

5. **Conclusion**: Based on the association and function of companion cells, the correct answer to the question is that companion cells are associated with sieve tubes.

**Final Answer**: Companion cells are associated with sieve tubes.

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