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8 Scientists can use the principle of superposition to analyze patterns in the fossil record...

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Biology

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8 Scientists can use the principle of superposition to analyze patterns in the fossil record E D C B A Pecten KAUSTR Mucrospirifer Crinoid Crinoid a Based on the diagram what conclusions can you draw about crinoids and mucrospirifers in relation to each other and to pectens Explain your reasoning 3 points b lodine 129 a radioactive isotope has a half life of 16 million years Suppose the rocks within layer D contain 3 125 of the original amount of iodine 129 What does this tell you about the age of the rocks in layer D What conclusion could you draw about pectens 2 points

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