An elongatied living cell attached with sieve tubes is found in

Options

A. angiosperms
B. gymnosperms
C. in bot angiosperms and gymnosperms
D. pteridophytes

Answer

To solve the question "An elongated living cell attached with sieve tubes is found in," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Key Components**: The question mentions an "elongated living cell" that is "attached with sieve tubes." We need to determine what type of cell this is and where it is found.

2. **Understand Sieve Tubes**: Sieve tubes are part of the phloem tissue in vascular plants. They are responsible for the transport of food (sugars) throughout the plant.

3. **Identify the Cell Type**: The elongated living cell associated with sieve tubes is known as a "companion cell." Companion cells are crucial because they help regulate the function of sieve tube elements, which lack a nucleus.

4. **Determine the Plant Groups**: The question provides options: angiosperms, gymnosperms, both angiosperms and gymnosperms, and pteridophytes. We need to know where companion cells are found.

5. **Analyze Angiosperms**: Angiosperms (flowering plants) have both sieve tubes and companion cells. The companion cells are present alongside the sieve tubes to assist in their functioning.

6. **Analyze Gymnosperms**: Gymnosperms (non-flowering seed plants) have sieve tubes but do not have companion cells. Thus, the elongated living cell mentioned in the question is not found in gymnosperms.

7. **Analyze Pteridophytes**: Pteridophytes (ferns and their relatives) do not have sieve tubes or companion cells, as they have a different type of vascular system.

8. **Conclusion**: Since companion cells are present only in angiosperms and not in gymnosperms or pteridophytes, the correct answer to the question is "angiosperms."

### Final Answer:
The elongated living cell attached with sieve tubes is found in **angiosperms**.

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