A revolution in the study of human evolution is under way thanks to the invention of techniques that enable DNA sequencing of not only modern humans, but also ancient humans. Human populations today are not considered separate species under the biological species, morphospecies, and phylogenetic concepts. Explain what kind of evidence supports this statement.

Verified step by step guidance

1. Understand the species concepts: The biological species concept defines species as groups of interbreeding natural populations that are reproductively isolated from other such groups. The morphospecies concept identifies species based on morphological similarities and differences, while the phylogenetic species concept defines species as the smallest monophyletic groups on a phylogenetic tree.
2. Review genetic evidence from DNA sequencing: Modern DNA sequencing techniques allow scientists to compare genetic material from different human populations. These studies show high genetic similarity and extensive gene flow between populations, indicating they are not reproductively isolated.
3. Consider morphological evidence: Physical anthropological studies show that while there are some differences in morphology (physical form and structure) among human populations, these differences are not sufficient to classify them as separate morphospecies.
4. Examine phylogenetic evidence: Phylogenetic analyses of human populations using DNA data do not show distinct monophyletic groups that would classify populations as separate species under the phylogenetic species concept. Instead, all humans belong to a single monophyletic group.
5. Synthesize the evidence: The combination of genetic, morphological, and phylogenetic evidence supports the conclusion that all human populations today belong to a single species, Homo sapiens, under the biological, morphospecies, and phylogenetic species concepts.