Question

Growth regulators, which control plant growth and development are called:
(a)Secondary metabolites
(b)Macro element
(c)Non-essential element
(d)Phytohormone
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Answer 1

Answer:

(d) Phytohormones.

Explanation:

Phytohormones are the other names given for plant hormones.

Plant hormones like Auxin, Cytokinin, Gibberellin, Abscisic acid and Ethylene help in Tropic movements (growth dependent movements) in plants.

And therefore regulates growth in plants.

Btw all the best to you and me for exam ;)

Answer 2

Answer:

The answer is (d)Phytohormone.

Explanation:

• The Plant growth regulators also called PGRs are chemicals utilized to modify plant growth such as improving branching, suppressing shoot growth, increasing return bloom, removing extra fruit, or changing fruit maturity. PGRs may be operated in conjunction with other plant control products such as herbicides or insecticides to achieve the desired result.
• Phytohormones or plant hormones exist as naturally occurring tiny organic molecules which affect physiological functions in plants at very low concentrations. These plant hormones regulate many metabolic processes in plants.

Hence, Growth regulators, which control plant growth and development exist named (d)Phytohormone.

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