Answer:
The scientist is studying oxygen which can also be found in protien. oxygen is the element which makes up to 65% of human body mass. It is also found in proteins inside the body.
Structure L and I are the superior and inferior vena cava. They bring de-oxygenated blood from the body into the right atria.
This is your own opinion. Write about what you would do as a forensic scientist and the good things about that job and vise versa for the least favorite.
The DNA region is easily accessible
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