Sunflower pistil, SEM

Sunflower pistil, SEM

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Credit: SUSUMU NISHINAGA/SCIENCE PHOTO LIBRARY

Caption: Sunflower pistil. Coloured scanning electron micrograph (SEM) of a sunflower (Helianthus annuus) pistil. Pollen grains (round and spiky, orange) are seen on the pistil. Pistils hold a plant's female reproductive structures. They contain one or more carpels, which, in turn, contain a stigma, style and an ovary. Within the ovaries are the ovules, the female gametes (sex cells). The ovaries are fertilised by pollen grains, the male gametes. Magnification: x115 when printed at 10 centimetres tall.

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Keywords: biological, biology, botanical, botany, carpel, carpels, coloured, false-colour, false-coloured, female, flower, gamete, gametes, grain, grains, helianthus annuus, images, magnified image, microscopic subjects, nature, ovaries, ovary, pistil, pollen, pollination, reproduction, reproductive organ, scanning electron micrograph, scanning electron microscope, sem, stigma, stigmas, style, styles, sunflower

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