SELECT * FROM question_mgmt as q WHERE id=3682 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=258 and ex_no='4' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Control and Coordination how does chemical coordination occur in plants

Question:

How does chemical coordination occur in plants?

Answer:

Plants do not have nervous or muscular system for movement or responsiveness like animals have. Plants only shows the growth (by growth hormones like phytohormones) with the attached substratum by giving them appropriate soil moisture, favourable environmental or physiological conditions. Various plant hormones are present for the plant growth like auxin, gibberellin, cytokinin, ethylene or abscisic acid.

Auxin is responsible for the growth of the stem, gibberellins are those growth hormones which enhances the long growth of stem according to the plant in the presence of meristematic cells, cytokinin acts on the cell division part of the plant, ethylene is a gas present in atmosphere and mainly responsible for fruit growth or ripening with root initiation ,And abscisic acid is responsible for seed development, stomatal closing, bud dormancy etc.

 


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