12. Name the regions in which parenchyma tissue is present.
13. What is the role of epidermis in plants?
14. How does the cork act as a protective tissue?
Answers
Answer:
12)LEAVES ,FRUIT,AND FLOWERS
13)IT ACTS AS BARRIER AGAINST INFECTION, MECHANICAL INJURY,WATER LOSS
14)IT CELLS ARE DEAD AND ARE COMPACTLY ARRANGED WITHOUT INTERCELLULAR SPACE
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Explanation:
11. Identify the type of tissue in the following: Skin, bark of tree, bone, lining of kidney tubule, vascular bundle.
Ans. (a) Skin–Striated squamous epithelium
(b) Bark of tree–Cork, protective tissue
(c) Bone–Connective tissue
(d) Lining of kidney tubule–Cuboidal epithelium tisse
(e) Vascular bundle–Conducting tissue
12. Name the regions in which parenchyma tissue is present.
Ans. In the pith of the roots and stems. When it contains chlorophyll, it is called chlorenchyma, found in green leaves. In aquatic plants, parenchyma contains large air cavities and help them to float. Such type of parenchyma is called aerenchyma.
13. What is the role of epidermis in plants?
Ans. Cells of epidermis forms a continuous layer without intercellular spaces. It protects all the parts of plants.
14. How does the cork act as a protective tissue?
Ans. Cork acts as a protective tissue because its cells are dead and compactly arranged without intercellular spaces. They have deposition of suberin on the walls that make them impervious to gases and water.