Male gametophyte is highly reduced in angiosperm and is known as pollen grain. It is 2 or 3-celled.

Correct Option: C

Male gametophyte is highly reduced in angiosperm and is known as pollen grain. It is 2 or 3-celled.

Filiform apparatus helps in the entry of pollen tube into a synergid in ovule. Filiform apparatus is in form of finger like projection comprising a core of micro fibrils enclosed in a sheath. It resembles transfer cells meant for short distance movement of metabolites. It is responsible for the absorption of food from the nucleus.

Correct Option: D

Filiform apparatus helps in the entry of pollen tube into a synergid in ovule. Filiform apparatus is in form of finger like projection comprising a core of micro fibrils enclosed in a sheath. It resembles transfer cells meant for short distance movement of metabolites. It is responsible for the absorption of food from the nucleus.

Sporopollenin is fatty substance present in pollen wall and provides resistance against extremes conditions like high temperature, acid, bases.

Correct Option: B

Sporopollenin is fatty substance present in pollen wall and provides resistance against extremes conditions like high temperature, acid, bases.

Cleistogamous flower produce assured seed set even in the absence of pollinations. Plants such as Viola, Oxalis and Commelina.

Correct Option: A

Cleistogamous flower produce assured seed set even in the absence of pollinations. Plants such as Viola, Oxalis and Commelina.

The germ pores are apertures in the exine layer of the pollen grain where the sporopollenin is absent. The germ pore helps in the formation of the germ tube or pollen tube and which makes its exit on germination.

Correct Option: C

The germ pores are apertures in the exine layer of the pollen grain where the sporopollenin is absent. The germ pore helps in the formation of the germ tube or pollen tube and which makes its exit on germination.