In 95% of cases of Down's syndrome, there is an extra piece of chromosome 21 in every cell. This condition is the result of

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

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 .

The process of replication is the same for all living things because