EasyBotanyPGR
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Plant growth regulators (PGRs) are:-
A
Small, simple substances of different chemical composition
B
Complex organic substances of different chemical composition
C
Simple and complex organic substances of same chemical composition
D
Small organic substances of same chemical composition
Explanation
The plant regulators are the simple organic substance of different chemical composition. Among them five major classes of plant hormones are: Abscisic acid, auxins, cytokinins, ethylene, and gibberellins. They are chemicals used to modify plant growth such as increasing branching, suppressing shoot growth, increasing return bloom, removing excess fruit, or altering fruit maturity. For the most part, each group contains both naturally occurring hormones and synthetic substances.
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