Which of the following organelles is used for locomotion in paramecium?

Explanation

Paramecium is a single-celled organism that belongs to the group of organisms called protozoa. It moves by using hair-like structures called cilia, which are found all over its body. The question is asking which organelle in paramecium is used for locomotion. Option A, pseudopodium, is not the correct answer because pseudopodia are temporary projections of the cell membrane and cytoplasm that are used for movement in some other organisms, such as amoeba. Option B, trichocyst, is not the correct answer because trichocysts are tiny, bottle-shaped structures that are used for defense in paramecium. Option C, cilium, is the correct answer because cilia are the hair-like structures that are found all over the body of paramecium and are used for locomotion. Each cilium is made up of microtubules that extend from the cytoplasm and are covered by a membrane. Option D, pellicle, is not the correct answer because the pellicle is a stiff, protective covering that surrounds the cell membrane in paramecium and provides support. Option E, contractile vacuole, is not the correct answer because contractile vacuoles are organelles that are used for maintaining water balance in paramecium and other single-celled organisms. In summary, the correct answer to the question is Option C, cilium, because it is the organelle that is used for locomotion in paramecium.