Question

growth of pollen tube towards ovule is an example of​

Answer 1

chemotropism

Explanation:

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.

Answer 2

Answer:

chemotropism pollen grain respond to stimulus by growing a pollen tubes. in downward direction towards ovule for fertilization