Question

14.
बीजांड की ओर पराग नलिका की वृद्धि का कारण होता है
(B)

के
हाइड्रोट्रॉपिज्म
(A)
(C) गुरुत्वानुवर्तन
The growth of pollen tube towards ovule is due​

Answer 1

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Answer 2

Reason for the growth of pollen tube toward ovule:

• The growth of a pollen tube towards the ovule is because of a chemical (sugar) substance that is secreted by the ripened stigma of the flower into the style towards the ovary.  

• It is actually an illustration of chemotropism where pollen grain rejoins to stimulus through mounting a pollen tube in a downward way that is towards ovule for fertilization.

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