Willow pollen grain, SEM

Willow pollen grain, SEM

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Credit: LOUISE HUGHES/SCIENCE PHOTO LIBRARY

Caption: Willow pollen grain, coloured scanning electron micrograph (SEM). Pollen grains, containing the male sex cells (gametes), are reproductive structures produced by the male parts of flowering plants. The structure shown is the hard outer casing (exine) that protects the gametes during transit between flowers. Magnification: x4150 when printed at 10 centimetres across.

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Keywords: 1, angiosperm, angiosperms, biological, biology, black background, botanical, botany, coloured, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, exine, false-color, false-colored, false-coloured, flora, flower, flowering plants, male sex cells, nature, one, outer casing, plant reproduction, pollen, pollen grain, reproductive, salix, scanning electron micrograph, sem, single, willow

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