Pollen from daisy

Pollen from daisy

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Caption: Daisy pollen. Coloured scanning electron micrograph (SEM) of several daisy (Bellis sp. ) pollen grains. The outer wall (exine) of each grain has spiky projections. These spines catch in the body hairs of pollinating insects. The insects then fly to other flowers and so pollen is transferred. Pollen contains the male reproductive cells of the plant. When the pollen grain, containing male gametes, lands on the stigma of a flower, it germinates. A pollen tube grows down through the stigma, to the ovary. Male nuclei pass down the tube, fertilize the ovules and a seed is formed. Magnification: x1600 at 6x6cm size.

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Keywords: bellis sp., botany, coloured sem, daisy, daisy pollen, exine, nature, plant, plants, pollen, reproduction, reproductive, type

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