Protozon
Protozoa have several types of vacuoles.The function of a contractile vacuole is to

maintain osmotic balance by continuous water expulsion
have sites for photosynthesis
contain specific enzymes that perform various functions
creates sites of food digestion

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Protozon
Holozoic nutrition is characterized by

photosynthesis
pinocytosis of solid nutrients and subsequent formation of phagocytic vacuoles
phagocytosis of soluble nutrients and subsequent formation of phagocytic vacuoles
phagocytosis of solid nutrients and subsequent formation of phagocytic vacuoles

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