Which one of the following is a difference between a normal cell and a cancer cell?

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. who is correct? a. sarah is correct because genetic diversity occurs over a long period of time. b. john is correct because genetic diversity occurs immediately. c. both are correct because genetic variation can occur or long period of time. d. neither are correct because genetic diversity occurs over any period of time

Iwanna go do something with my ideas? ?