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    Question

    Which of the following is true about the digestion

    process of the Paramecium ? I. Food is taken in at a specific spot. II. Food is moved to this spot by the movement of cilia. III. Cilia are present only at the front and back of the organism. 
    A Only I Correct Answer Incorrect Answer
    B Only III Correct Answer Incorrect Answer
    C Only I and II Correct Answer Incorrect Answer
    D All of the above Correct Answer Incorrect Answer

    Solution

    I and II are correct. However, III is incorrect. Cilia are microscopic, hair-like structures that extend outward from the surface of the organism. Paramecium feeds on microorganisms like bacteria, algae, and yeasts. The paramecium uses its cilia to sweep the food along with some water into the cell mouth after it falls into the oral groove. Cilia cover the entire surface of the cell. Hence, option C is correct. 

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