SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Geranium pollen. Coloured scanning electron micrograph (SEM) of pollen (pink) on the stamen of a geranium flower (Geranium sp.). The stamens are male reproductive structures that consist of a filament topped by a pollen-bearing anther. Pollen grains are the male sex cells of a flowering plant.
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