Blue-green algae. Coloured transmission electron micrograph of a single cell of the blue-green algae Microcystis aeruginosa (also known as Anacystis cyanea). Blue-green algae (cyanobacteria) are primitive algae; in structure they are related to bacteria. They are prokaryotes containing no membrane-bound nucleus; instead,as in bacteria,nuclear material is dispersed throughout the cell. Photosynthetic lamellae (thread-like structures,outer part of cell) are the primitive chloroplasts. M.aeruginosa cells are found in colonies; they bloom in late summer and may liberate a toxin that kills plankton,fish and birds. Magnification: x16,320 at 6x6cm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Dowsett, A.B. |
Taille de l’image : | 4598 px × 4598 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |