Correct Response: D. The hierarchy of taxonomic groups, from most inclusive to least, is domain > kingdom > phylum > class > order > family > genus > species >. From this it follows that any two organisms in the same family are of necessity in the same phylum (A). The same is true of any two organisms in the same genus (B) or order (C).

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IB Biology Exam Prep

Category - Biology

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In biological classification, which of the following taxonomic groups includes all the others?

Family.
Genus.
Order.
Phylum.

Explanation

Correct Response: D. The hierarchy of taxonomic groups, from most inclusive to least, is domain > kingdom > phylum > class > order > family > genus > species >. From this it follows that any two organisms in the same family are of necessity in the same phylum (A). The same is true of any two organisms in the same genus (B) or order (C).

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