Question

(iv) Name the various types of plant tissue and state their functions.
(v) State the differences between parenchyma, collenchymas and sclere
tissue with diagrams.​

Answer 1

Answer:

plants

have only three tissue types: 1) Dermal; 2) Ground; and 3) Vascular. Dermal tissue covers the outer surface of herbaceous plants. Dermal tissue is composed of epidermal cells, closely packed cells that secrete a waxy cuticle that aids in the prevention of water loss.

Explanation:

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Answer 2

Answer:

parenchyma :

1. parenchyma is a living tissue.

2. parenchyma cells are thin walled, oval, spherical or polygonal in shape.

3. they have large intercellular space.

4. parenchyma cells do not have thickening on their walls .

5. function of parenchyma is storage and support.

collenchyma :

1. collenchyma is a living tissue.

2. collenchyma cell are elongated in shape.

3. they have very little intercellular space.

4. collenchyma cell are thickened at the corner.

5. gives mechanical support and flexibility to various plant parts .

sclerenchyma :

1. sclerenchyma is a dead tissue.

2. the sclerenchyma cell are polygonal in shape.

3. they have no intercellular space.

4. sclerenchyma cells are thickened due to lignin deposition around their walls.

5. make plant part hard & stiff . provide strength to the plant. it is also seen in vascular bundle in which conduction is possible.

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