Question

guys plzz help !!!!!!! Give reasons for the following: 1.The growth of the plants occurs only at certain specific regions. 2.It is difficult to pull out the husk of a coconut. 3.Epidermal cells on the aerial parts of a plant secrete waxy, water resistant substance. 4.Intercellular spaces are absent between the cells of sclerenchyma tissue. 5.Braches of tree move and bend freely in high wind speed. 6.Meristematic cells have a prominent nucleus and dense cytoplasm but they lack a vacuole.

Answer 1

Answer:1The growth of plants occurs only in certain specific regions. This is because the dividing tissue, also known as meristematic tissue, is located only at these points.

2The cell walls of sclerenchyma are greatly thickened due to the presence of lignin. ... (e) It is difficult to pull out the husk of a coconut tree due to the presence of sclerenchyma tissue. The cells of sclerenchyma tissue are closely packed without intercellular spaces, a middle lamella exists between them.

Explanation:

3Small pores, called stomata, are present on the leaf, and help in the exchange of gases and water. Epidermal cells on the aerial parts of the plant secrete a waxy, water-resistant layer on their outer surface. ... In desert plants, epidermis has a thick waxy coating of cutin, to check water loss.

4Intercellular spaces are absent in sclerenchymatous tissues because they have a cementing substance (known as lignin) around their cell membrane which makes them stiff and hard.

5Branches of a tree move and bend freely in high wind velocity because of the presence of collenchyma that adds the property of flexibility

6Meristematic cells are continuously dividing cells so they have a prominent nucleus and dense cytoplasm. But since these cells do not store food material or waste materials, they lack vacuole. Sclerenchyma cells have lignified cell walls which makes them compact and leaves no intercellular spaces.

PLZ MARK BRAINLIEST

Answer 2

Answer:

1. The growth of plants occurs only in certain specific regions. This is because the dividing tissue, also known as meristematic tissue, is located only at these points. ... Apical meristem is present at the growing tips of stems and roots and increases the length of the stem and the root.
2. The cell walls of sclerenchyma are greatly thickened due to the presence of lignin. ... (e) It is difficult to pull out the husk of a coconut tree due to the presence of sclerenchyma tissue. The cells of sclerenchyma tissue are closely packed without intercellular spaces, a middle lamella exists between them.
3. Epidermal cells on the aerial parts of a plant secrete waxy, water resistant substance.
4. Intercellular spaces are absent in sclerenchymatous tissues because they have a cementing substance (known as lignin) around their cell membrane which makes them stiff and hard.
5. Branches of a tree move and bend freely in high wind velocity because of the presence of collenchyma that adds the property of flexibility
6. .Meristematic cells are continuously dividing cells so they have a prominent nucleus and dense cytoplasm. But since these cells do not store food material or waste materials, they lack vacuole. Sclerenchyma cells have lignified cell walls which makes them compact and leaves no intercellular spaces