Sophie says dolphins and sharks look very similar so they must be related Jake disagrees says dna evidence has shown that the dolphins and other mammals are actually more closely related to the of modern hippos who is cracked using the modern system system of classification

About which of these did darwin have a poor understanding? a) that much of the variation between individuals in a population is inherited b) the factors that cause individuals in populations to struggle for survival c) the sources of genetic variations among individuals d) that individuals in a population exhibit a good deal of variation e) how a beneficial trait becomes more common in a population over the course of generations