The answer is: cell wall and DNA
Water on each side of a divide flows in the opposite direction from the top to the bottom on each side of the divide. A divide is understood to be a ridge, mountainous area, a shallow basin or a manmade shelter of sorts. Water flow is affected by natural topographical features as well as manmade objects. For example, rainwater will flow down each side of a hill towards a stream or a lake. The shape of the top of the hill will determine in which direction the water will flow. Rainwater will also soak into the ground and flow downwards towards the water table on either side of the hill.
I believe the answer is B - point source comes from a specific site, non-point comes from many sources
Answer:
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Explanation:
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The same is true for our skin and our liver cells. Or our brain and muscle cells. Or any of the other 300 or so different cell types. These cells are different because they use the same set of genes differently.