Which of the following best explains the movement of DNA during gel electrophoresis? A. Since restriction enzymes cut DNA into differently sized pieces, polymerase is able to move the fragments through the gel.
B. Since polymerase enzymes cut DNA into differently sized pieces, restriction enzymes are able to move the fragments through the gel.
C. Since DNA is positively charged it attracts toward the negative end of the gel plate.
D. Since DNA is negatively charged it attracts toward the positive end of the gel plate.

A. Since restriction enzymes cut DNA into differently sized pieces, polymerase is able to move the fragments through the gel.

Explanation:

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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causes

fossil fuels burn

cities become more industrialized

human population grows worldwide