Answer: more out of us
Explanation:well we breath 21 % of oxygen so that means their is more out of us
If the conclusions do not support their hypothesis they would start the experiment all over again and see what they did wrong. <span />
Answer:
Depends on the situation Usually the hardest would be blood samples of the Unknown Subject. Again It depends on the situation.
Cells are simply the basic units from which living things are made of, some are single cell organisms while others could be made of thousands, millions or billions of cells.
Metabolism refers to the sum total of chemical reactions that take place usually, but not by any means always, inside cells e.g they could also occur in the blood plasma or in inter-cellular spaces. They are indispensable for sustaining life.
The us celebrates Earth Day on April the 22