Question

Q18. How does control and coordination take place in plants?
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Answer 1

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Control and coordination in plants is performed by chemical substances known as plant hormones or phytohormones. The synthesis and action of phytohormones are greatly influenced by external stimuli. Plants respond to photoperiodic stimulus by specialized pigment present in very small quantity called phytochrome.

Answer 2

Answer:

Explanation:

the chemical substances that are naturally produced in plants

• They are capable of regulating the important process of plants

• different plants hormones help to coordinate growth , development and response to the environment
• AUXIN : the hormone usually synthesised in the young tip of roots and shoots helping them

• GIBBERELLINS : the hormones that help in the growth of the stem and flower
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