False colour transmission electron micrograph of the blue-green algae,Spirulina platensis. Here,a single cell of this species is seen. Blue-green algae (cyanobacteria) are primitive algae. Their internal structure is closely related to bacteria. They are prokaryotic organisms which contain no membrane-bound nucleus; instead,as in bacteria,their nuclear material is dispersed throughout the cell. Photosynthetic lamellae (thread-like structures) are the primitive equivalent of chloroplasts. The red spots are food reserves known as cyanophycin granules. Some Spirulina species are eaten as a protein-rich health food. Magnification: x6660 at 6x4.5cm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Dowsett, A.B. |
Bildgröße: | 2743 px × 3542 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |