Light micrograph of pollen grains of the Willow herb,Epilobium. Each grain has three wing-like structures which assist in its dispersal by the wind. Pollen grains contain the male gametes. They germinate on the female stigma of the flower,growing a tube which enters the ovary. The male nuclei pass down this tube to fertilize an ovule and form a seed. Magnification: unknown. Given magnification: x180 at 35mm size,but this is inconsistent with B786/387 given as x80 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nuridsany, Claude / Perennou, Maria |
Bildgröße: | 5077 px × 3514 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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