Biology
The figures given below represent three kinds of supporting tissues in plants.
A
B
C
(i) Mention the name of tissues (A), (B) and (C).
(ii) Write one structural difference between the tissues A and B.
(iii) Which of these tissues is located in the petiole of a leaf ?
(iv) Write one functional difference between the tissues A and C.
(v) Name the tissue in which the cells are long, narrow, thick-walled and dead.
Tissues
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Answer
(i) The name of tissues (A), (B) and (C) are:
A → Parenchyma
B → Collenchyma
C → Sclerenchyma
(ii) One structural difference between Parenchyma and Collenchyma:
| Parenchyma | Collenchyma |
|---|---|
| Parenchyma is composed of large thin walled cells, usually with intercellular spaces. | Collenchyma is made up of living cells which are elongated and are thick at the corners or edges. |
(iii) Collenchyma is located in the petiole of a leaf.
(iv) One functional difference between Parenchyma and Sclerenchyma:
| Parenchyma | Sclerenchyma |
|---|---|
| Parenchyma stores food material. | Sclerenchyma provides a rigid mechanical and structural support to the plant. |
(v) Sclerenchyma is composed of cells that are long, narrow, thick-walled and dead.
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