The multiple systems that make this simple topic complex, so here is a link to a document you can add to.
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Transportation in Animals and Plants: An Introduction
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See AllThe Lithosphere: The surface of the earth made up of solid rock and soil is called the lithosphere. It comprises the seven continents and...
There are many substances in this world, such as iron, air and soil. They are all different from one another in composition, properties...
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