Blue-green algae. Transmission electron micrograph of a single cell of the blue-green alga Pseudanabaena sp. 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 (layered structures,outer part of cell) are the primitive chloroplasts. Pseudanabaena occurs as motile filaments of cells,called trichomes. Magnification: x100,000 at 8x10 inch size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lounatmaa, Dr. Kari |
Taille de l’image : | 2529 px × 3152 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |