Question

Pollen grain germinates through

• A. Micropyle
• B. Integument
• C. Chalaza
• D. Germ pore

Answer 1

The correct option is D Germ pore

•Micropyle is an opening present in the ovule which is covered by the integuments. It is the site of entry of pollen tube during fertilisation.

•Integuments are the protective coverings of the ovule. Integuments may be one or two in number. Ovules with one integument are called unitegmic and those with two integuments are called bitegmic.

•Chalaza is that region of ovule which is opposite to the micropylar pole.

•Germ pores are the region of the pollen grains, where exine is ruptured or discontinuous because sporopollenin is absent at these regions. Germ pores are the sites through which pollen tube emerge out during germination

So, the correct answer is D.