The classification levels of a human are listed from largest to smallest. Eukarya Animalia Chordata Mammalia Primates Hominidae Homo sapiens Which level of biological classification do Mammalia and Hominidae represent, respectively?

The classification levels proceed from broad to specific: kingdom, phylum, class, order, family, genus, and species. In the list, Mammalia is the class and Hominidae is the family. Therefore, the correct choice is class and family.

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