This cyanobacterium ,Nostoc punctiforme, from the Amazon floodplain in Brazil shows cells and its terminal heterocyst. Heterocysts are large cells involved in nitrogen fixation. TEM X26,000.
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This cyanobacterium ,Nostoc punctiforme, from the Amazon floodplain in Brazil shows cells and its terminal heterocyst. Heterocysts are large cells involved in nitrogen fixation. TEM X26,000.

Filename: 188868.jpg
Photographer: Dr. Terry Beveridge
Source: Visuals Unlimited, Inc.
Date: 2 Jul 2011
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Credit: Dr. Terry Beveridge/Visuals Unlimited, Inc.
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