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Tracheids are primitive vascular element...

Tracheids are primitive vascular elements and
(a) Are rarely found in pteridophytes
(b) Are dead cells at maturity
(c ) Have thickened lignified walls with simple pits

A

All are correct

B

Only (b) is correct

C

Both (a) and (b) are incorrect

D

Both (a) and (c ) are correct

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding tracheids, we will analyze each of the provided statements one by one. ### Step-by-Step Solution: 1. **Understanding Tracheids**: - Tracheids are elongated, tube-like cells that are part of the vascular tissue in plants. They play a crucial role in the transport of water and minerals. 2. **Analyzing Statement (a)**: - The statement claims that tracheids are rarely found in pteridophytes. - **Evaluation**: This statement is incorrect. Tracheids are actually present in pteridophytes, as they are one of the primitive vascular elements found in these plants. 3. **Analyzing Statement (b)**: - The statement claims that tracheids are dead cells at maturity. - **Evaluation**: This statement is correct. Tracheids lose their protoplasm and become dead cells at maturity, which allows them to efficiently conduct water. 4. **Analyzing Statement (c)**: - The statement claims that tracheids have thickened lignified walls with simple pits. - **Evaluation**: This statement is partially correct. Tracheids do have thickened lignified walls, but they typically have bordered pits rather than simple pits. Therefore, this statement is misleading. 5. **Conclusion**: - Based on the evaluations: - Statement (a) is incorrect. - Statement (b) is correct. - Statement (c) is misleading due to the mention of "simple pits." - Therefore, the only correct statement is (b). ### Final Answer: The correct answer is (b) Are dead cells at maturity. ---
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