Recent DNA evidence suggests to some plant taxonomists that the traditional way of classifying flowering plants is not correct after all, and that flowering plants need to be completely reclassified. Other botanists disagree, saying it would be chaotic and unwise to disregard the historical classification groups. What are arguments for and against keeping traditional classification schemes?
Two populations of frogs apparently differ only in skin coloration. What data would you need to determine if both populations belong to the same species? If they are two different species what data would you need to determine who closely related the two species are?