Are viruses alive? The scientific debate continues. Viruses exhibit some characteristics of life, but others are missing. The MOST obvious reason why scientists still refer to viruses as non-living is that they.

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 .