Which phrase best describes an individual organ?
O A. The simplest unit of life
O B. Made of...
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Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?
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Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel
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Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule
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