How does Paramecium ensure that food particles are directed to its intake spot?
Uses movement of cilia covering the cell surface
Paramecium is a unicellular organism with a definite shape, and it takes in food at a specific spot (the oral groove / cytostome).
Its cell surface is covered with fine hair-like cilia; their beating movement sweeps food particles along to this intake spot.
Pseudopodia are used by Amoeba, which has no fixed shape, while contractile vacuoles remove excess water and do not move food.
Hence, the answer is Uses movement of cilia covering the cell surface.
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