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If birds are not descendants of dinosaurs, what have scientists proposed they may have descended from?
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Which class of organic compounds makes up the channels and pumps that move materials from one side of the cell membrane to the other? a.) carbohydrates b.) lipids c.) proteins d.) nucleic acids
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Name the glands associated with human digestive system
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Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.
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If birds are not descendants of dinosaurs, what have scientists proposed they may have descended fro...
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