Marrow pollen grain, SEM

Marrow pollen grain, SEM

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This image is part of the sequence Pollen app (pollen)
This image is part of the feature Pollen Under The Microscope


Caption: Pollen grain. Coloured scanning electron micrograph (SEM) of a pollen grain from a marrow plant (Cucurbita sp.). This is among the largest of any plant pollen. There is great variation in the size, shape and surface texture of pollen. The outer wall (exine) is highly sculpted in many plants, which may assist in dispersal. Each pollen grain contains a male gamete, which fertilises the eggs or ovules, initiating the formation of plant seeds. Magnification: x353 at 6x7cm size.

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Keywords: botany, cell, cells, circle circles, coloured, cucurbita sp., exine, gamete, gametes, grain, grains, images, large, largest, magnified image, male, marrow, microscopic photos, nature, plant, plants, pollen, reproduction, reproductive, round shape, rounded circular, scanning electron micrograph, sculpted, sculpting, sem, sex, sexual, spike, spikes, spiky, structure, subjects, wall

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