Question

2.19) Describe structure of root hair ? Add a no
2.20) Define growth hormone? Explain physiological effect and application of auxin
21 Define the following term's..​

Answer 1

Answer:

1.Root hairs, or absorbent hairs, are tubular outgrowths of a trichoblast, a hair-forming cell on the epidermis of a plant root. These structures are lateral extensions of a single cell and are only rarely branched. ... Plants absorb water through the roots from the soil by bulk flow.

2.Growth hormone or somatotropin, also known as human growth hormones in its human form, is a peptide hormone that stimulates growth, cell reproduction, and cell regeneration in humans and other animals. It is thus important in human development

3.Physiological effects of auxin are: (i) Auxins are well known to promote the elongation of the stem. It promotes the growth by elongation of cells behind the apical meristem. (ii) Growth in the lateral bud is inhibited when the apical bud of a tall plant remains intact

Explanation: