Expulsion of undigested waste material through anus is known as ___ .

assimilation

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ingestion

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egestion

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digestion

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Solution

The correct option is C egestion
$∙$ Ingestion is the intake of food by an organism.
$∙$ Digestion is the process of breaking down complex food substances into simple absorbable forms.
$∙$ Assimilation is the absorption of digested food molecules for energy.
$∙$ The left over undigested food is removed from the body through anus by the process of egestion.

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The process of excreting unused or undigested material through the anus is known as __________.

The expulsion of the undigested remains of the food from the alimentary canal is called defaecation.

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