Which of the following is/are required to designate populations as separate species under the phylogenetic species concept?

A) Each population forms a monophyletic group.
B) Members all have the unique characteristics that define the species.
C) There is strong reproductive isolation between the populations.
D) a and b
E) a, b, and c

Phylogenetic Species Concept

A concept in taxonomy that defines species based on their evolutionary history, identifying groups by unique genetic markers or traits.

Monophyletic Group

A group of organisms that consists of a common ancestor and all its descendants, also known as a clade.

Reproductive Isolation

A set of mechanisms that prevent different species from mating or ensure that if they do mate, their offspring will be sterile or not survive.