Answers

2016-03-28T22:25:35+05:30
The pollen grains are usually coveren by a thin delicate membrane callled as  endospore or intine and sporopollenin or exine(thicker membrane).
Hope this answer helped.....comment if further doubt persists...!!! :)
0
  • Brainly User
2016-03-28T23:08:55+05:30
The outer most wall of the pollen grain is endospore
0