Plants may be made to grow taller by applying the chemical:
Correct answer: C. Gibbereellic acid
- A. Dichlorophenoxy acetic acid
- B. Trichlorophenoxy acetic acid
- C. Gibbereellic acid
- D. Phosphon
Explanation
It stimulates cell division and expansion in response to light or dark.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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