Define pollen grain.

Differentiate between Exine and Intine of pollen grain.

Define pollen calender. What are the allergic reactions caused by pollen grains?

Intine of pollen grain is composed of.

imagine the structure of pollen grain of a sweet scented small flower and the structure of ovule . From the appearance of the pollen grain . (a) Identify the agent of pollination . (b) During fertilization what will be the contribution of the pollen grain in the female gametophyte ?

One of the most resistant biological material present in the exine of pollen grain is

Microsporangium is generally surrounded by four wall layers. Name the layer which nourishes developing pollen grains.

Flowers of the garden pea are bisexual and self-pollinated .Therefore ,it iks difficult to perform hybridization experiment by crossing a particular pistil with the specific pollen grains.How Mendek made it possible in his monohybrid and dihybrid crosses?

Size of pollen grain in Cucurbitaceae.

Size of pollen grains in Myosotis