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Question

Assertion :Euglena is studied as an animal as well as a plant. Reason: Euglena is autotrophic and heterotrophic both.

A
Both assertion and reason are correct and reason is the correct explanation for assertion.
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B
Both assertion and Reason are correct but reason is not the correct explanation for assertion.
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C
Assertion is correct but reason is incorrect.
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D
Both assertion and reason are incorrect.
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Solution

The correct option is A Both assertion and reason are correct and reason is the correct explanation for assertion.
Euglena belongs to class Protista. It is considered as plant and animal both because it is autotrophic when sunlight is present but turns heterotrophic under the unfavourable condition when the sunlight is not there. Euglena chloroplasts contain pyrenoids, used in the synthesis of paramylon, a form of starch energy storage enabling Euglena to survive periods of light deprivation.
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