(a) Define reflex arc. Draw a flowchart showing the sequence of events which occur during … four plant hormones. Write one function…
a) The pathway taken by nerve impulses in a reflex action called the reflex arc :
(b) Auxin : It promotes elongation and division of cell and root formation.
Gibberellins : They help in growth of stem.
Cytokinins : They promote cell division and delay leaf ageing.
Abscisic acid : It prevents wilting of leaves.