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Embryos of different species look very similar, which shows that the organisms share a ancestor.
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Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
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Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20
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Element x reacts with copper to form the compounds cux and cux2. in which group on the periodic tabl...
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