Assertion(A): Ciliated protozoans are passively moving aquatic organisms.
Reason(R): They have a cavity (gullet) that opens to the outside of the cell surface.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic:  Protozoa |
From NCERT
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