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Question 19 (1 point) One of the ways that our microbiota prevents the growth of pathogens is through competitive exclusion.

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19) option b is correct

The term competitive exclusion actually means that two closely related species competing for the same resources can not co exist and inferior one will be eliminated.

Members of the microbiota use up available nutrients and prevents the growth of pathogens.

20) It is a true statement.

Cytotoxic T cells destroys infected cells via endogenous pathway.

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