Question

A group of students performing an experiment collect Euglena samples from a pond and keep them in darkness in a vessel containing pond water. Which would be the conclusion for this experiment?

Answer 1

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The conclusion of the experiment of collecting Euglena samples from a pond and keep them in darkness in a vessel containing pond water; is the following; 

The Euglena cells, which are both autotrophic and heterotrophic, remain alive even in the absence of sunlight because they can feed upon the organic material present in the pond water.