Question

Mention the derivate of epidermis with its function. What changes takes place in epidermis as the plant grows older? Give functions of stomata.

Answer 1

Answer:

The epidermis, derived from somatic ectoderm, is the exterior-most covering of the chordate body. It provides protection against the invasion of microorganisms, provides flexibility in motion, and seals in moisture.

Explanation:            As plants grow older, the outer protective tissue undergoes certain changes. A strip of secondary meristem replaces the epidermis of the stem. Cells on the outside are cut off from this layer. This forms the several-layer thick cork or the bark of the tree.

Functions of stomata: The two main functions of stomata are to allow for the uptake of carbon dioxide and to limit the loss of water due to evaporation. The gaseous exchange (CO 2 and O 2) between the intercellular spaces of plant cell and the outer air takes place through stomata during photosynthesis

Answer 2

Answer:

As plants grow older, the outer protective tissue undergoes certain changes. A strip of secondary meristem replaces the epidermis of the stem. Cells on the outside are cut off from this layer. This forms the several-layer thick cork or the bark of the tree.