What do the contour lines do as they crossover a stream

Contour lines "point" upstream when they cross a river or stream. ... The water flows out of the opening of the V or U shape and the closed end points uphill. Rule # 5- The spacing of contour lines depends on slope characteristics. Closely spaced contour lines represent a steep slope.

Explanation:

Plasmolysis is the contraction of the protoplast of a plant cell as a result of loss of water from the cell while hemolysis is the rupture or destruction of red blood cells.

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