If fossil evidence of the most recent common ancestor of A and B (10 million years ago) was found on both sides of the river (that formed 20 million years ago), then the distribution of A and B is best explained by vicariance. ( choose true or false) 2- It is possible that species C will speciate.  ( choose true or false) 3- The distribution of the two species-C populations cannot be explained by two totally independent dispersal events by the common ancestor species of A and B.   ( choose true or false) 4- B must share a more recent common ancestor with C1 than it does with C2.  (choose true or false)

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.