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31.0 MB (31.0 MB compressed)
3583 x 3027 pixels
30.2 x 25.7 cm ⏐ 11.9 x 10.1 in (300dpi)
SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Hibiscus flower pollination. Coloured scanning electron micrograph (SEM) of pollen grains (small balls, lower centre) on the pistil of a Hibiscus sp. flower. Pollen grains are the male sex cells of a flowering plant, and the pistil is the female reproductive structure of a flower. When a pollen grain lands on a pistil, it can burrow down through it to the ovary, where it fertilises the female sex cell (ovum). Magnification unknown.
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