Charles is an engineer who is evaluating a prototype of an artificial heart. He should notice the prototype missing is : a structure that would divide the hollow heart into chambers to separate oxygenated blood from deoxygenated blood.
Many of the cell's metabolic processes take place in A. the cytoplasm. In prokaryotes, metabolic processes take place in the cytosol, which is the word for cytoplasm without organelles.
The earth orbits the sun once per year
It's the pull of gravity on an object.
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