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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, 22.06.2019 17:00
How many autosomes are in this human karyotype? how many sex chromosomes?
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B. How does weathering affect Earth's surface?...
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