JANNICKE WIIK-NIELSEN / SCIENCE PHOTO LIBRARY JANNICKE WIIK-NIELSEN / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of pollen grains from the flowering herbaceous plant Cosmos bipinnatus, known commonly as garden cosmos or Mexican aster. The pollen grains contain a male gamete (reproductive cell) that is intended to fertilise an egg or ovule (female gamete). This will initiate the formation of a seed for a new plant. Magnification: x640 when printed at 10cm wide.
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