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प्रश्न
Write a short note on sclerenchyma.
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उत्तर
Sclerenchyma cells are dead cells devoid of protoplasm. Its cell walls are thick and lignified. There are no intercellular spaces between the cells. Middle lamella exists between two sclerenchymatous cells. They are found in stems, roots, veins of leaves, hard covering of seeds, and nuts. Cells of collenchyma are of two types:
(a) fibres and
(b) sclereids (grit cells or stone cells).
The main function of sclerenchyma is to provide mechanical support and protection to the plant.
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संबंधित प्रश्न
Which tissue makes up the husk of coconut?
Complete the following chart:
Explain different types of elements present in phloem.
What is the difference between parenchyma and collenchyma?
Study the diagram given below and then answer the question that follows:
Name the parts labelled 1, 2, 3 and 4.
Study the diagram given below and then answer the question that follows:
Where is this tissue likely to be found in the plant?
Differentiate between:
Collenchyma and Sclerenchyma
Differentiate between Xylem and Phloem functioning
Match the column (A) with the column (B)
| (A) | (B) | ||
| (a) | Parenchyma | (i) | Thin walled, packing cells |
| (b) | Photosynthesis | (ii) | Carbon fixation |
| (c) | Aerenchyma | (iii) | Localized thickenings |
| (d) | Collenchyma | (iv) | Buoyancy |
| (e) | Permanent tissue | (v) | Sclerenchyma |
Cells of this tissue are living and show angular wall thickening. They also provide mechanical support. The tissue is ______.
