A) pseudopodia
B) contractile vacuole
C) nucleus
D) ectoplasm
Correct Answer: B
Solution :
Contractile vacuole is a cell organelle related with osmoregulation, .i.e., removal of excess water and present in free living protozoa like Amoeba and absent in parasitic protozoa like Entamoeba histolytica. Pseudopodia are locomotory organelles of class Sarcodina or Rhizopoda, eg, Entamoeba, Amoeba. Nucleus and ectoplasm are present in all protozoans.
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