19. why did the egyptians use the mummification process on their dead? they believed it would keep the corpses from rising to the surface. they had not perfected an easy and safe method of cremation. they believed this would protect their dead relatives from grave robbers. they believed the body should arrive in the afterlife safely and intact.

Some organisms have a large geographic range. for example, the norway rat lives on every continent except antarctica. a population of norway rats is the number of rats in one particular area. do you think it’s scientifically possible for a population of norway rats in north america to carry different genetic mutations than a population of norway rats in africa? do you think it’s possible that they carry some of the same mutations? what types of information can scientists learn by studying the genomes of these two populations of rats?