Pollen is produced by the male reproductive organs of flowering plants, called anthers.

Here's a breakdown:

* Flower: The flower is the reproductive structure of a plant.

* Stamen: Inside the flower, the stamen is the male reproductive part.

* Anther: The anther is the top part of the stamen where pollen is produced.

Pollen grains are tiny, powdery structures that contain the male gametes (sperm cells) of the plant. They are dispersed by wind, water, insects, or other animals to reach the female reproductive part of another flower, where they can fertilize the ovules and lead to the formation of seeds.