So what was it like 2.7 million years ago?
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Biology, 21.06.2019 19:00
The model illustrates a process by which a substance is taken up by a cell
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Biology, 22.06.2019 00:30
What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.
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Biology, 22.06.2019 04:00
The distribution of related animals and plants across the world
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