Abaseball can be compared to the earth. the earth's crust is most like the baseballs

Which are reasons cells undergo cell division?

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient