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Sunflower pollen grain, SEM

Sunflower pollen grain, SEM

C018/0310

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Credit

CLOUDS HILL IMAGING LTD / SCIENCE PHOTO LIBRARY 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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