Pollen grains, SEM

Pollen grains, SEM

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Credit: DAVID SCHARF/SCIENCE PHOTO LIBRARY

Caption: Pollen grains. Coloured scanning electron micrograph (SEM) of an assortment of pollen grains. The size, shape and surface texture of pollen varies greatly between plants. The outer wall (exine) of the grains is highly sculpted in many species, which may assist in wind, water or insect dispersal. This sculpting is also used by botanists for identifying and classifying plants. Each grain contains one of the plant's male gametes. These fertilise the eggs (female gametes), initiating the formation of seeds. Magnification: x370 at 6x7cm size. x550 at 4x5"

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Keywords: allergen, allergens, allergy, botany, coloured, exine, gamete, gametes, grain, grains, male, many, multiple, nature, plant, plants, pollen, reproduction, reproductive, scanning electron micrograph, sem, surface

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