Anabaena sp., light micrograph

Anabaena sp., light micrograph

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Credit: CLOUDS HILL IMAGING LTD/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of Anabaena sp., a member of the Cyanophyta division - the blue-green algae, showing the arrangement of single cells into filaments. A single row of cells is termed a trichome; a trichome surrounded by its 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 and thus provide a means of vegetative reproduction. They can form algal blooms, and produce neurotoxins which can cause illness.

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Keywords: alga, algae, algal, anabaena sp., biological, biology, bloom, blue green, blue-green, botany, cyanobacteria, filament, fresh-water, heterocyst, light, light micrograph, lm, microbiological, microbiology, microorganism, microorganisms, microscopic, microscopy, nature, neurotoxic, neurotoxin, nitrogen-fixing, nitrogen-fixing algae, no-one, nobody, plant, poisonous, pond life, reproduction, toxic, toxicity, toxin, trichome, vegetative, yellow, zoological, zoology

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