POLLEN GRAIN STRUCTURE

STAMEN, MICROSPORANGIUM AND POLLEN GRAIN

Pollen grain is

Pollen grain is

Pollen grain of Capsella is

Assertion : Conifer trees produce a large quantity of wind-borne pollen grains Reason : The pollen grains have wings.

Assertion. A pollen grain of angiosperm is considered as the male gametophyte . Reason. All the nuclei of the pollen grain produce male gametes.

Assertion Pollen grains are well preserved during fossilisation. Reason The exine of pollen grain contains sporopollenin.