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A cell membrane protects a cell from it's surroundings. The cell membrane controls the movement of substances from the outside and inside of cells and organelles.
The correct order that oxygen enters the body is definitely C.
Bronchi, then Lungs, bronchioles, alveoli, blood!
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Answer:
By altering one of these regions, a variant (also known as a mutation) in noncoding DNA can turn on a gene and cause a protein to be produced in the wrong place or at the wrong time. Alternatively, a variant can reduce or eliminate the production of an important protein when it is needed.
Explanation: