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Question

Study the diagram given below and then answer the questions that follow:

(a) Identify the tissue and give a reason to support your answer.
(b) Name the parts labelled 1, 2, 3, and 4.
(c) Where is this tissue likely to be found in the plant ?
(d) State the function of the parts labelled 1, 2, 3 and 4.

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Solution

(a) The given diagram is of the phloem tissue because the cells show cellular contents, unlike the xylem tissue which contains hollow cells without any cellular contents.

(b) 1 → Sieve cell
2 → Phloem parenchyma cell
3 → Companion cell
4 → Sieve plate

(c) The phloem is a food-conducting tissue and is likely to be found in the leaves and stem of plants to carry the food manufactured in the leaves to various parts of the plant.

(d) 1 → Sieve cells: Help in the transport of food from leaves to storage organs and other parts of the plant.
2 → Phloem parenchyma cells: Storage of starch, fat and other organic food material.
3 → Companion cells: Help in the functioning of the sieve tube cells.
4 → Sieve plate: Perforations in the sieve plates allow water and dissolved organic solutes to flow along the sieve tube.


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