Question

multiple choice question
for animals and plants, a group of interbreeding natural populations reproductively isolated from other groups is called a ______.

family
strain
species
genus

Explanation:

This matches the biological species concept, which defines a species as a group of interbreeding natural populations that are reproductively isolated from other such groups. Family, genus are broader taxonomic ranks above species, and strain refers to a genetic variant within a species, not a reproductively isolated interbreeding group.

Answer:

O species