A group of organisms assigned to a particular category

• A. Taxonomy
• B. Paradigm
• C. Taxon
• D. Immutability

Answer: (C)

The concept here is identifying the unit used for classification. A taxon is the named group of organisms that is placed into a specific category within a classification system, at any rank from species up to domain. So when we say “a group of organisms assigned to a particular category,” we’re referring to that group itself—the taxon. For example, Homo sapiens is a taxon at the species level within the genus Homo.

In contrast, taxonomy is the field that studies and describes these groups, not the group itself. A paradigm is a framework or model guiding scientific thinking, not a naming unit. Immutability would imply the group never changes, which isn’t accurate in biology where classifications can shift with new evidence.