Contractile vacuole is absent in marine and parasitic protozoa because – McqOptions

MCQOPTIONS

1.	Contractile vacuole is absent in marine and parasitic protozoa because
A.	Excretory products are not found
B.	Hypertonic condition of internal and external medium
C.	Isotonic condition of internal and external medium
D.	Excretion is absent
Answer» D. Excretion is absent

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