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Of the 5 major mass extinction events, which was most severe?
Answers: 3
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The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes
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Which statement names a physical property of wood? wood does not rustwood can burnwood can rotwood is softer than coal
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Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled
Answers: 1
Of the 5 major mass extinction events, which was most severe?...
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