Describe7 marksChallenge
Two closely related species of frog (A and B) inhabit the same region. Species A is found in fast-flowing streams on the eastern side of a mountain range, while species B lives in stagnant ponds on the western side. Another pair of species (C and D) live in the same lowland forest but breed at different times of the year and produce distinct mating calls. Using these examples, describe how the theory of evolution accounts for the formation of new species from pre-existing species over time. In your answer, explain how DNA sequence data can be used to determine evolutionary relationships between species, and distinguish between allopatric and sympatric speciation.