Growth of pollen tube towards embryo sac is

Pollen-Pistill Interaction is mediated by

The generative cell of a two-celled pollen divides in the pollen tube but not in a three-celled pollen. Give reasons.

$60\; \%$ of the angiosperms shed their pollens at the

Through which route the pollen tube enters the ovule

Function of filiform apparatus is to