B.) A dog walks to a stream and drinks when it gets thirsty
would have to be your answer..
A carbon atom has 4 valence electrons
Pressure decreases with increasing altitude.
Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell. And that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
