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B
Green algae
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C
Diatoms
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D
Dinoflagellates
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Solution
The correct option is B Green algae Euglena is a genus of single-celled flagellate protists. Euglena can be both heterotroph and autotrophs but algae can only be autotroph. Euglena act like heterotroph when sunlight is not available. Most species of Euglena have photosynthesizing chloroplasts within the body of the cell, which enables them to feed by autotrophy, like plants. However, they can also take nourishment heterotrophically, like animals.