Sunflower pollen grain, SEM

Sunflower pollen grain, SEM

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Credit: CLOUDS HILL IMAGING LTD/SCIENCE PHOTO LIBRARY

Caption: Sunflower pollen grain. Coloured scanning electron micrograph (SEM) of a pollen grain from the sunflower (Helianthus annuus). The grains have a spiked outer wall (exine), which assists in their dispersal to the female parts of other sunflowers by improving their adherence to pollinating insects. The characteristic surface of pollen grains is used by botanists to recognise and classify plants. Pollen grains are the male sex cells of a flowering plant.

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Keywords: 1, asteraceae, biological, biology, botanical, botany, cells, colored, coloured, compositae, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, dispersal, exine, false-colored, false-colour, false-coloured, gamete, gametes, grain, grains, green background, helianthus annuus, male, nature, one, outer wall, pollen, pollen grain, reproduction, reproductive, scanning electron micrograph, scanning electron microscope, sem, sex cell, single, spiked, spikes, spiky, sunflower

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