This is a picture of a flower. A flower has pollen. In the picture the pollen is the yellow powder located in the middle of the flower. Pollen is a powdery substance, usually yellow in color, that consists of microscopic grains, that contain gametes, from the male part of a flower. Since the grains contain gametes pollen that's transported by wind, insects, and other animals can fertilize the female ovule. Pollen is also a source of many allergies in the spring time.
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