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Explain the importance of producers, primary consumers, secondary consumers and decomposers in an ecosystem.
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Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt
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Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms...
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