Imagine that researchers are studying 2 populations of a hypothetical flowering plant, Darwinius beardii. Individual plants of population "A" grow to an average height of 25 cm, while those of population "B" average 40 cm. The flowers of population "A" are light purple and open in mid-April, while those of population "B" are dark purple with white spots and open in early May. These 2 populations are geographically separated by a large river, and geological and molecular genetic evidence suggests that they have been separated for at least 10 million years, during which time evolutionary divergence has occured. Yet, when individuals from each population are brought into the lab, they readily mate with individuals of the other population. Under which species concept(s) would the plants of the 2 populations be considered 2 different species? O A. Biological species concept O B. Phenetic species concept O C. Phylogenetic species concept O D. both the Phenetic and Phylogenetic species concepts

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Evolutionary lineages

An evolutionary lineage is a series of populations of organisms that descend from a common ancestor. Each species in the lineage is the direct consequence of evolutionary change from a common ancestor. A phylogenetic tree is generally used to display lineages visually. Lineages are components of the phylogenetic tree of life. Molecular systematics procedures are widely used to predict lineages.