Water fern (Azolla filiculoides) covering the surface of a pond. This aquatic fern forms a symbiotic relationship with a cyanobacterium,enabling it to fix nitrogen from the air | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Fleming, Vaughan |
Bildgröße: | 3680 px × 4860 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |