Platypuses - What ancestral trait would be consider laying eggs?, allopatric speciation - Occurs when a population is divided by some type of barrier, biological species concept - The concept that species is defined as a group of organisms that interbreed in nature and are reproductively isolated., character displacement - The result of competition between two species that causes the members of different species to become morphologically or behaviorally more different from each other, phylogeny - The evolutionary relationships among a group of species, usually diagrammed as a “family tree.”, hominoids - Any member of the superfamily Hominoidea, which includes humans,, Taxonomy - A branch of biology that is concerned with the use of phylogenies for naming and classifying organisms., analogous - Similarity between traits that is due to convergent evolution, not common descent. For example, the fact that humans and kangaroo, homologous - Similarity between traits that is due to common ancestry, not convergence. For example, the reason that gorillas and baboons are both quadrupeda, Ancestral trait - A trait that appears earlier in the evolution of a lineage or clade., carbohydrates - From what food source do primates get their sugar intake?,

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