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5. Scientists are concerned about a decrease in global biodiversity due to extinctions of organisms now and in the future. Scientists know about a mass

5. Scientists are concerned about a decrease in global biodiversity due to extinctions of organisms now and in the future. Scientists know about a mass extinction that wiped out the dinosaurs in a very short time. Describe a possible cause of this mass extinction and two consequences that may give scientists cause for alarm about the possibility of future mass extinctions. (3 points)

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