Chemical for arresting cell division is extracted from (1) Crocus (2) Colchicum (3) Chrysanthemum (4) Dalbergia

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Colchicine is a chemical obtained from the plant Colchicum autumnale. It arrests the spindle fibres at metaphase stage of cell division and hence, chromosomes are not separated at anaphase stage due to which ploidy level of the cell is increased.

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