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Images Dated 20th December 2002

Choose from 10 pictures in our Images Dated 20th December 2002 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Blue-green alga, Spirulina platensis Featured 20 Dec 2002 Image

Blue-green alga, Spirulina platensis

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