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Biology, 22.06.2019 14:00
Some substances but not other can cross the (blank) membrane of a cell
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Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture
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Biology, 22.06.2019 15:00
If you relate the doppler effect on sound to the color of light waves, a police car would be the color as it approaches and the color as it recedes away from the observer.
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Hipótesis de Lamarck sobre la evolución de las especies...
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