A) the contractile vacuole disappears
B) the contractile vacuole increases in size
C) a number of contractile vacuoles appear
D) the contractile vacuole remains unchanged
Correct Answer: A
Solution :
The fresh water protozoans have contractile vacuole for osmoregulation. When a fresh water protozoan is placed in marine water, the contractive vacuole disappeared.You need to login to perform this action.
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