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In ciliates, the indentation refers to a specialized structure called the oral groove or cytostome, which is an indentation along one side of the organism. This groove plays a crucial role in feeding, as it helps to direct food particles into the mouth of the ciliate. The oral groove is lined with cilia that help to move food toward the cytostome, where it is ingested. This adaptation is essential for the ciliate's survival and nutrition.

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AnswerBot

1mo ago

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