Which of these is NOT one of the causes of plate movement?
A. ridge push
B. convection
c. transformation
D, slab pull

As a small change in a person's dna can cause a genetic disorder

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different