Question

what is the smallest taxonomic group that contains organisms of different species?
○ genus
○ order
○ family
○ domain

Explanation:

To determine the smallest taxonomic group containing different species, we analyze each option:

• Genus: A genus can include multiple species (e.g., Canis includes Canis lupus (wolf) and Canis familiaris (dog)).
• Order: Larger than genus (e.g., Carnivora includes many families and genera), not the smallest.
• Family: Larger than genus (e.g., Canidae includes multiple genera), not the smallest.
• Domain: The broadest taxonomic level (e.g., Bacteria, Archaea, Eukarya), much larger than genus.

Among these, genus is the smallest group that can contain different species.

Answer:

A. genus