Question

why the exine should be hard?...what is the function of the germ pore?​

Answer 1

Answer:

1) Yes exine should be hard because it protects pollen grain (by which pollen grain develops normally) from severe conditions. It is the outermost layer made up of sporopollenin which protects pollen grain from harsh environmental conditions

2) On the other hand, Germ Pore is a thin area and a pore in the outer wall of the pollen grain or a spore. This is the area from where the germ tube or a pollen tube exits through during germination

Answer 2

Answer:

due to the presence o highly resistant material sporopollenin. exchange of materials takes place through germ pores where the sporopollenin is absent

HOPE THIS HELPS