Alder tree pollen. Coloured scanning electron micrograph (SEM) of a pollen grains from an alder tree (Alnus glutinosa). A pollen grain contains a male sex cell from a flowering plant. Millions of pollen grains are produced by each flowering plant. In the process of pollination,some of these pollen grains are transported from a flower's anthers to the female reproductive parts of a plant. This allows the female and male sex cells to combine in the formation of a seed. Alder trees are fast-growing deciduous trees found mostly in the temperate areas of the Northern Hemisphere. Magnification x6980 (x1725 at 10cm wide) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Power And Syred |
Bildgröße: | 4800 px × 4800 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |