Populations that were once considered separate species are sometimes reassigned to the same species because
A) they are no longer capable of interbreeding.
B) it was discovered that they can produce viable and fertile offspring.
C) they have been found to be genetically identical.
D) they have evolved to look different from each other.
E) they have evolved to look the same.

Question

Quizplus · Accepted Answer

Species are often reclassified as the same species if it is discovered that they can interbreed and produce viable, fertile offspring, as this is a key criterion for defining a species under the biological species concept.

Populations That Were Once Considered Separate Species Are Sometimes Reassigned