Earth Science What is the fall line?(1 point) a tall, steep area where rivers form rapids and waterfalls a series of mountains and mountain ridges that are related a flat, lowland area on the coast of the Atlantic Ocean a raised area in the foothills of the Appalachian Mountains

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper