Apopulation of mammals originally lived in a certain area surrounded by land.  then, some of the organisms were taken to an island.  these two populations remained separated for hundreds of years. which of the following is most likely true of the organisms within the populations?   a.  the organisms on the island are slightly different than those on the mainland.  b.  the organisms on the island are exactly the same as those on the mainland.  c.  the organisms on the island are no longer a mammalian species like those on the mainland.  d.  the organisms on the island are completely different than those on the mainland.

Which of the following statements describes how the characteristics of different species of mammals reflect the evolutionary relationships among those species? shared anatomy among mammals, such as hair and mammary glands, suggests that a common ancestral species had these features. similarities in the dna and protein structures of mammal species suggest that these species evolved from a common ancestor. although all modern species of mammals share some features, the differences between them mean they cannot share a common ancestor.

How many chromosomes are in a gold fish?

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.