False-colour scanning electron micrograph of Nostoc sp. ,a filamentous blue-green algae (Cyanophyta),criss-crossing the surface of a small rock. Nostoc has the ability to fix atmospheric nitrogen,thereby playing a major role in soil fertility. It has a wide distribution & is commonly found in soil,on mud,rocks,& other plants. It also forms the algal partner of a number of lichens. Blue green algae are considered to be exceedingly primitive organisms,dating back to pre-Cambrian times. Magnificaton: x125 at 6x4.5cm size,x70 at 35mm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Burgess, Dr. Jeremy |
Taille de l’image : | 3469 px × 2605 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |