Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion Bacteria, Protista do not have circulatory system. Reason These organisms live in moist and watery environment.A) extinction of these species from other regions
B) continental separation
C) absence of terrestrial route to these places
D) retrogressive evolution
Correct Answer: B
Solution :
Bacteria, Protista are single-celled organisms. They do not have circulatory systems and live in moist and watery environments so that all their cells are close enough to the external environments for the direct exchange of substances such as water and gases.
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