Q20 of 805 Page 194

Name the plant hormones responsible for the following

(a) elongation of cells


(b) growth of stem


(c) promotion of cell division


(d) falling of senescent leaves

(a) Auxin is a plant hormone produced in the stem tip that promotes cell elongation.

(b) Gibberellin is a plant hormone that causes growth of stem.


(c) Cytokinin is a plant hormone that promotes cell division.


(d) Abscisic acid is a plant hormone that controls falling of senescent leaves.


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