I would assume that because of not only sports but because of what americans do, like eat alot or smoke etc. it can effect organ systems because the heart has veins leading to every other organ, when the heart stops, the organs stops too.
Leaves would have most chloroplasts
Answer:
The answer is weather & climate
Explanation:
Answer:
It involves facilitated diffusion.
Explanation:
Facilitated diffusion uses channel proteins. Channel proteins allow substances to travel through a membrane going <em>with</em><em> </em>the gradient. Since active transport goes <em>against</em> the gradient, facilitated diffusion would not be a characteristic of it.
