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By KPPSC LECTURER BOTANY SOLVED PAST PAPER 31-10-24 No Comments

First plant hormone discovered:

A. Cytokinins
B. Gibberellins
C. Auxins
D. Ethylene

Explanation: Auxins were the first plant hormones discovered, known for regulating growth.

The correct answer to the question: "First plant hormone discovered:" is "Auxins".

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