Pollination guarantees the transfer of the right type of pollen.

Anthers and filaments form the _____

Pollination is a characteristic of </h2></div>

Double fertilization in angiosperms was discovered by ..................</h2></div>

___ divide after endosperm formation.

Why are pollens spiny?

X is a dicot flowering plant and Y is an algae. Identify X and Y.</h2></div>

Pollen grains are able to withstand extremes of temperature and desiccation because their exine is com…