The theory of endosymbiosis states that 1.5bn years ago, some early eukaryotes (the ancestor cells of animals and plants) engulfed bacterial cells and kept them prisoner inside their cells. They did this so they could harvest the sugars that the bacterial cells were producing. The bacterial cells used light to produce sugars from carbon dioxide and water. Eventually, these engulfed bacteria became which type of organelles?
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Which organelle breaks down sugar molecules that supply energy to the cell ?
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Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.
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Some substances but not other can cross the (blank) membrane of a cell
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The theory of endosymbiosis states that 1.5bn years ago, some early eukaryotes (the ancestor cells o...
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