In practice, the biological species concept cannot be used to reliably distinguish all species because
A) some 'species' form fertile hybrids.
B) some 'species' do not reproduce sexually.
C) subgroups within a particular 'species' may interbreed with some, but not all, others.
D) All of these are correct.
E) None are correct as a species is well defined.

Question

Quizplus · Accepted Answer

The biological species concept, which defines species based on the ability to interbreed and produce fertile offspring, faces challenges such as the formation of fertile hybrids between species (A), the existence of organisms that do not reproduce sexually (B), and complex interbreeding patterns within species (C).

In Practice, the Biological Species Concept Cannot Be Used to Reliably