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What is the next step in the process after a substrate enters the active site of an enzyme
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Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins
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Which is an example of a vestigial structure? a: paw of a lionb: wing of a birdc: appendix of a humand: tail of a cat(i think it's a but i'm not sure)
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Adam created with waste rock from surface mining is called a(n) a) interglacial period b) valley fi...
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