1.

Growth of pollen tube towards ovule is ____ movement​

Answer»

The growth of a pollen tube towards OVULE is induced by a chemical (sugar) substance SECRETED by the ripened stigma of flower into the STYLE towards OVARY. It is an example of chemotropism, pollen grain responds to stimulus by GROWING a polen tube in downward direction, towards ovule for fertilisation.30-Aug-2020



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