Answer:
In plants, chemical
coordination occurs with the help of plant hormones (phytohormones). Different
plant hormones help to coordinate growth, development and responses to the
environment. They are synthesized at places away from where they act and simply
diffuse to the area of action, for example, auxin. Another example of plant
hormones are gibberellins which help in growth of the stem, cytokinins promote
cell division, abscisic acid is a plant hormone which inhibits growth and its
effects include wilting of leaves.
[NCERT, CBSE
Delhi 2008C]
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