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Biology, 22.06.2019 03:50
What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen
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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 15:30
Wich is not standing in the way of astronomers getting a good view of different star
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Biology, 22.06.2019 17:00
Evolution acts upon the population of organisms and not on each individual organism
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Why does a delta often form where a river meets the ocean?...
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