Fossil evidence indicates that some dinosaurs had feathers. if birds are indeed descended from dinosaurs, feathers are what kind of character? -polyphyletic character -shared ancestral character -shared derived character -analogous character -cladistic character

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.

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

What is responsible for the uneven heating between the poles and the equator on any given day