They were routes which allowed pioneers to move to the west in the 19th century
Explanation:
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Answer:
The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment. The cell membrane consists of a lipid bilayer that is semipermeable. The cell membrane regulates the transport of materials entering and exiting the cell.
Explanation:
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The President appoints justices and the Senate must approve of them.