It is respiration because all living things do it and have to do it because they have to make energy to survive. After all, respiring is just a reaction that makes energy to go into cells, doesn't matter if it's a plant or jellyfish or whatever.
Carbon Monoxide, which is C, I put that and got it right.
Answer:
B. Theory
Explanation:
A theory can be changed as new information is discovered.
Answer:
<em>In heart valve disease, one or more of the valves in your heart doesn't work properly. Your heart has four valves that keep blood flowing in the correct direction. In some cases, one or more of the valves don't open or close properly.<u> This can cause the blood flow through your heart to your body to be disrupted.</u></em>