| I. They are also called protozoa. |
| II. They can be seen by microscope. |
| III. Examples are- bacteria, archaea. |
A) I and II
B) II and III
C) I and III
D) All of these
Correct Answer: D
Solution :
[d] Unicellular organism send their whole life depending upon only one cell, these are also called as protozoa unicellular organisms can be seen by microscope as they are very small. Some example of unicellular organism are bacteria, archaea.
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