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प्रश्न
Give reasons for
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
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उत्तर
Meristematic cells have a prominent nucleus and dense cytoplasm because they are metabolically highly active and are in continuous state of division. Meristematic cells lack vacuole because they do not store food material, waste material, sap, etc.
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संबंधित प्रश्न
Based on the following information, identify the three types of epithelial tissue in the figures given below :
| a |  |
b |  |
c |  |
(1) Cuboidal epithelium: It consists of a single layer of cuboidal cells.
(2) Columnar epithelium: It is composed of tall, cylindrical cells with oval nuclei usually placed at the base of the cells.
(3) Ciliated epithelium: It consists of cells being hair-like cilia on their free surface.
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Inner lining of the wind pipe
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Write true (T) or false (F)
Epithelial cells have a lot of intercellular spaces.
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Epithelial layer is permeable layer.
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Epithelial layer does not allow regulation of materials between body and external environment.
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