Answer:
A
Explanation:
Before exchange, it is expected that the capillaries (that have deoxygenated blood) will have more carbon dioxide while the lungs will have more oxygen. This allows for oxygen to diffuse into the capillaries while carbon dioxide diffused into the lungs during the exchange.
Answer:
Rocks on land
Explanation:
The salt in the ocean comes from rocks on land.
C. Changes to biodiversity can positively and negatively affect an ecosystem.
Answer:
pulling further back on the string
Explanation:
I chose that because as for me answer 2 and 3 don't make sense but as for answer four I don't think that when you decrease the mass of the arrow this will increase the kinetic energy because for it to move faster I'll have to pull the string harder or to enlarge it ,so to increase the kinetic energy it is just determined by how I pull that string ."have I enlarged it or it is still loose."
