Which is a unique feature of Venus? A. The thick atmosphere—made mostly of carbon dioxide—absorbs solar radiation, heating up an
d helping make the atmosphere very hot. B. It is the smallest planet and has the shortest period of revolution around the sun. C. The planet’s surface is covered with red, iron-oxide dust. D. It is the only planet with permanent liquid water on its surface.
<span>Does Earth have a layer of iron-oxide dust on the surface making it red? Is Earth the smallest planet? Is Earths atmosphere hot? (Some parts but not all) The answer is D, Earth is the only planet that has water on it that we know of</span>
Option C 100mv because the membrane goes from -70 mV to +30 mV. Thus, during the action potential, the inside of the cell becomes more positive than the outside of the cell.
