<span>C. generate a topic
Examining different writings could help you produce ideas.
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In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.
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<span>D. Temperature and pH can affect how enzymes work.</span> The action of enzymes can be affected by many factors including temperature, pH and ionic strength. Optimum pH differs per enzyme. Enzymes can be destroyed by heat more than the allowed optimum temperature.
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generic variation helps species survive because it gives there offspring there traits to survive
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Placer mining can be less damaging to the environment than surface mines, as the sediment is returned to the water after the minerals have been extracted.
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