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प्रश्न
Give reasons for
Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.
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
Distinguish between Simple epithelium and compound epithelium
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.
Name one place in living organisms where the following tissue is located:
Ciliated epithelium
Name the tissues found:
at the inner lining of the trachea.
What is an epithelium? Enumerate the characteristic features of different epithelia.
Fats are stored in human body as
Write true (T) or false (F)
Epithelial cells have a lot of intercellular spaces.
Write true (T) or false (F)
Epithelial layer does not allow regulation of materials between body and external environment.
In a certain type of cell division, the diploid number of chromosomes is reduced to half. This kind of division occurs in ______.
Write one point of difference between
Simple and compound epithelial tissue.
