the growth of pollen tube the ovule is ________movement.
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Solution : 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.
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chemotropism
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the growth of pollen tube the ovule is chemotropism movement
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