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Question

A slide under microscope shows following features :
(i) Unicellularity
(ii) Well defined nucleus
(iii) Biflagellate-one flagellum lying longitudinally and the other transversely
What would you identify it as?

A
Protozoan
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B
Bacterium
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C
Euglenoid
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D
Dinoflagellate
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Solution

The correct option is D Dinoflagellate
These features are matching to the Kingdom Protista. Protista are single-celled eukaryotes. Members of Protista are primarily aquatic. Being eukaryotes, the protistian cell body contains a well-defined nucleus and other membrane-bound organelles. Protista includes Chrysophytes, Dinoflagellates, Euglenoids, Slime molds, and Protozoans. Most of the Dinoflagellates have two flagella, one lies longitudinally and the other transversely in a furrow between the wall plates.
So the correct option is "Dinoflagellate".


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