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An elongatied living cell attached with ...

An elongatied living cell attached with sieve tubes is found in

A

angiosperms

B

gymnosperms

C

in bot angiosperms and gymnosperms

D

pteridophytes

Text Solution

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The correct Answer is:
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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