Because the molecules that are being transported is moving against its concentration. gradient. in other words, its moving from where it's low in concentration to where it's high in concentration.
The two differences you see when comparing the four chambers of the heart is that the arteries have a thicker wall and veins have thin walls and that the arteries carry oxygenated blood away from the heart which means they get more pressure than veins.
earthquakes produce both body and surface waves which is the fast sesmic wave!!
hope this helps!!
The best reason to use a temperature probe is to<span> record continuous measurements over several minutes.
Hope it Help!</span>
Physical chemists study matter and energy, and there is chemical reactions in your body, and all living things have elements, like carbon.
I would say D
