A) Amoeba
B) Leech
C) Spider
D) Paramedum
Correct Answer: D
Solution :
Paramecium swims actively at a normal rate of about 1.5 mm per second by means of its cilia, using energy supplied by ATP. .But during feeding, the ciliary beating is changed in such a way so as to create a continuous conical current of water called "vortex" to enter into the vestibule from far in front. Some particles are used, which are coming from current and large ones are useless for food and are removed by ciliary tract of the vestibule. This type of feeding is called filter-feeding.
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