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Phloem

Assertion A: ...

Question

Assertion (A): In phloem tissue, vessels and tracheids of roots, stems and leaves are interconnected forming a continuous system of water conducting channels.
Reason (R): The phloem tissues are composed of living cells and hence are more suitable for water conduction.

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Solution

The correct answer is Option B.

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Q. Water and dissolved minerals get into the root hair of a plant by a process called A and enter the conducting tissue B. The process C helps the water and dissolved minerals to move up through the tissue B in roots and stem, and reach the leaves of a plant. In the leaves food is made by a process D. This food is then transported to all the parts of a plant through tissue E. The process of distributing food made in the leaves to all the parts of the plants is called F.
(a) What are (i) A (ii) B (iii) C (iv) D (v) E, and (vi) F?
(b) Which tissue is made up of living cells : B or E?
(c) Which tissue, B or E, contains sieve tubes?
(d) Which tissue, B or E, contains tracheids?

Q. Assertion :Xylem and, ,phloem are also called as leptons and syndrome respectively Reason: Xylem and phloem form conducting tissue of the plant

Q. Which of the following statements are correct?
1. Vessels are the water-conducting tissue found in a gymnosperm.
2. Vessels and sieve tubes both are meant for transport purposes.
3. Phloem fibres are the only living element present in phloem.
4. Lignin make the walls of sclerenchyma cells thick.
5. Parenchyma cells are usually loosely arranged with large intercellular space.

Q. Assertion :Vessels are more efficient for water conduction as compared to tracheids. Reason: After secondary growth, the vessels are dead and lignified.

Statement 1: Vascular tissues are complex tissues.

Statement 2: Xylem and phloem tissues are meant for conduction of water and food respectively.

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