Alder tree pollen grain, SEM

Alder tree pollen grain, SEM

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This image is part of the sequence Pollen app (pollen)

Credit: 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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Keywords: 1, alnus glutinosa, biological, biology, black alder, botanical, botany, colored, coloured, common alder, european alder, false-color, false-colored, false-colour, false-coloured, flora, gamete, male sex cell, nature, one, pollen, pollen grain, pollination, reproduction, reproductive, scanning electron micrograph, scanning electron microscope, sem, single, tree

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