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Biology, 22.06.2019 12:30
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
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Biology, 23.06.2019 02:50
During the past 150 years in the united states, how did energy consumption compare to population growth?
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