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Solution


Q.

Which hormone was first isolated from human urine
 a) Auxin                 b) ABA                    c)    Ethylene                      d) Gibberellic acid
1 A
2 B
3 C
4 D

Ans.

(a) Auxin (derived from Greek work auxin, which means to grow) was first isolated from human urine. Kogl and Heagen Smith (1931) isolated three chemicals from human urine and named them as auxin