What is a pollen grain?
A pollen grain is produced by pollen mother cells. (1)
Pollen grains are haploid male gametophytes. (1)
What do pollen grains contain?
male gametes (sperm) (1)
The pollen is released by the opening off the anther. (1)
The pollen is carried by some agent (wind, or some animal) to the receptive surface of the stigma of the same or another flower. (1) This process is known as pollination.
Resources
1. https://kids.kiddle.co/Stamen
