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Alder tree pollen grain, SEM

Alder tree pollen grain, SEM

C010/5221

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Credit

POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY

Caption

Alder tree pollen grain. Coloured scanning electron micrograph (SEM) of a pollen grain from an alder tree (Alnus glutinosa). A pollen grain contains a male sex cell from a flowering plant. Millions of pollen grains are produced by each flowering plant. In the process of pollination, some of these pollen grains are transported to the female reproductive parts of a plant. This allows the female and male sex cells to combine during the formation of a seed. Alder trees are fast-growing deciduous trees found mostly in the temperate areas of the northern hemisphere. Magnification: x4000 when printed at 10 centimetres wide.

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