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Scientists classify the different types of soil into major groups based on climate, plants, and soil composition. ... Some soil organisms make humus, the material that makes soil fertile. Other soil organisms mix the soil and make spaces in it for air and water.
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Specialised cells , nerve cells , blood cells
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a human and appropriate body part is head, neck, back, hips
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In its simplest definition, organic compounds include all molecules that contain carbon. By this definition, simple molecules such as carbon ...
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