Which of the following is a difference between a law and a theory? A theory explains a scientific phenomenon whereas a law describes a natural process.
A law is based on observations whereas a theory is not.
A law can change based on new evidence whereas a theory does not.
A law explains a natural process whereas a theory describes a natural process.

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.

Ther are many reasons.. is it a multiple choice?