Extinction
a. only happens above the species level
b. cannot happen to more than one species at a time
c. has happened to over 99% of species that ever lived on earth
d. happens when a species or population dies out

Regarding most of the narrator’s story, which word best describes the tone?

The image shows the evolution of a species of fish. a few fish from a population developed different social behaviors and evolved into different species. two fish according to the image, the fish underwent . the new species of fish had mating seasons that were different from that of the original fish. because of the differences in mating seasons, the fish underwent reproductive isolation. this mode of isolation would be .

Which of the following describes how binary fission and mitosis are similar? a)they are both used for growth or repair b)they both break down membrane-bound nuclei c)both invoke the replication of a single stand of dna d)both replicate genetic material