Which of the following statements explain why the process of mitosis is essential to life?
A. Mitosis is the process by which the nucleus of the cell divides and is
responsible for limiting genetic variation.
B. Mitosis is the process by which the nucleus of the cell divides and is
responsible for increasing genetic variation.
C. Mitosis is the process by which the parent cell divides into two
separate cells and is responsible for limiting genetic variation.
D. Mitosis is the process by which the parent cell divides into two
separate cells and is responsible for increasing genetic variation.

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi, r^3 , where r is the sphere’s radius.

The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!