Saxifraga nathorstii flowers,close-up. This Arctic plant is a natural hybrid between two other saxifrage species,S. oppositifolia and S. aizoides. It is a polyploid plant,having doubled the number of its chromosomes after hybridization. Such doubling allows a sterile hybrid to become fertile by permitting the correct pairing of chromosomes during meiosis (the formation of sex cells). Polyploidy is an important evolutionary mechanism as it allows the immediate formation of new species. Photographed on Clavering Island in North East Greenland National Park,Greenland | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Fraser, Simon |
Bildgröße: | 4683 px × 3044 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |