Question

Entamoeba histolytion is different from Amoeba, because it does not possess:(a) food vacuole(b) contractile vacuole(c) nucleus(d) nuclear membrane

Answer 1

Explanation:

Contractile vacuoles, common in freshwater Protozoa, eliminate water that moves into the cells by osmosis. The contractile vacuole is present in amoeba but absent in Entamoeba because Amoeba lives in water and needs osmotic regulation. ... Therefore, there is no need of contractile vacuole. Thus, the correct answer is B