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B
nucleus
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C
None of these
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D
both of them
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Solution
The correct option is A cell wall Cilia and flagella are projections from the cell. They are made up of microtubules. They are motile and designed either to move the cell itself or to move substances over or around the cell. The primary purpose of cilia in mammalian cells is to move fluid, mucous, or cells over their surface. Cilia and flagella have the same internal structure.