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MO1003: Plankton bloom of the Ciliate Spirostomum sp. in garden pond in late summer, the indevidual cells are clumping together due to raised oxygen levels after increased photosynthesis from aquatic plants during a hot sunny day, it has been noted that microrganisms react quickly to changing gas gradients, and is possibly an ancient response that evolved during the mesoproterozoic era.
   
 
   
   
     
 

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