Light micrograph of Anabaena sp.,a member of the Cyanophyta division - the blue-green algae,showing the arrangement of single cells into filaments,surrounded by a gelatinous sheath. N.B. A single row of cells is termed a trichome; a trichome plus a gelatinous sheath is known as a filament. Anabaena sp. has the ability to fix atmospheric nitrogen,a feature associated with heterocysts; large,thick-walled,empty cells which divide a filament & thus provide a means of vegetative reproduction | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / PROF. DAVID HALL |
Taille de l’image : | 3624 px × 2447 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |