Some protozoans have special organelles called contractile vacuoles that continually eliminate excess water from the cell. The presence of these organelles tells you that the environment
A. is isotonic to the protozoan.
B. is hypotonic to the protozoan.
C. contains a higher concentration of solutes than the protozoan.
D. is hypertonic to the protozoan.
Answer:B
Some protozoans have special organelles called contractile vacuoles that continually eliminate excess water from the cell. The presence of these organelles tells you that the environment
A. is isotonic to the protozoan. B. is hypotonic to the protozoan. C. contains a higher concentration of solutes than the protozoan. D. is hypertonic to the protozoan.