Q29 (a) Name the following
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(i) Waxy layer that covers epidermis of aerial parts of plants.
(ii) Which structure protects the plants against the invasion of parasites.
(iii) Describe the functions of parenchyma tissue
(b) why are plant tissues mainly composed of dead cell?
(C) Write two differences between two types of transporting tissue in plants
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Answers
Answer:
1. Cuticle. 2. Epidermis has thick cuticle, trichomes and dermal tissue to prevent the invasion of parasites and other harmful agents into the plant body.
3. Plant parenchyma cells make up the bulk of leaves, flowers, and the growing, dividing inner parts of stems and roots. They perform functions such as photosynthesis, food storage, sap secretion, and gas exchange.
4. Dead cells, which don't have organelles filling them up, have a greater capacity for transporting water. Both of these cell types are dead when they are used in the xylem.
5. Xylem and phloem facilitate the transportation of water, minerals and food throughout the plant. Xylem carries water and minerals from the roots to the leaves. Whereas, phloem carries the food prepared by the leaves to different parts of the plant.
Explanation:
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Answer:
() cuticle
(ii) cork
(iii) function of parenchyma tissue is to :
Plant parenchyma cells make up the bulk of leaves, flowers, and the growing, dividing inner parts of stems and roots. They perform functions such as photosynthesis, food storage, sap secretion, and gas exchange.
(b) Dead cells, which don't have organelles filling them up, have a greater capacity for transporting water. ... Both of these cell types are dead when they are used in the xylem
(c) Xylem and phloem facilitate the transportation of water, minerals and food throughout the plant. Xylem carries water and minerals from the roots to the leaves. Whereas, phloem carries the food prepared by the leaves to different parts of the plant