Paramecia are single-celled animals because they are composed of (),

Paramecia are single-celled animals. This is because they are composed of (one cell) and do not have (chloroplasts) in their bodies. They cannot synthesize organic matter by themselves. Food enters their bodies to form (food bubbles), and in During internal digestion, oxygen can be obtained directly from the water through the surface membrane, and excess water in the body is excreted from the anus.

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