____________ identified and crystallized the cytokinesis promoting active substance called kinetin.

F.W.Went

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Miller

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E.Kurosawa

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H.H.Cousins

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Solution

The correct option is B Miller
Miller identified and crystallized the cytokinesis promoting active substance called kinetin. Kinetin was discovered from autoclaved herring sperm DNA. Herring is a kind of fish. Kinetin is a type of cytokinin. It promotes cell division.

F.W. Went isolated auxin from the tips of coleoptiles of oat seedlings.
E. Kurosawa discovered Gibberellin. He investigated the foolish seedling disease and found that it was caused by a fungal pathogen Gibberella fujikuroi.
H.H. cousins confirmed that volatile substances were released from ripened oranges that helped in quick ripening of unripened bananas. This substance was later identified as ethylene.

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Cytokinin

Standard XII Biology

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