Created by StemPy LabA wooden bowl from an old site has one thirty-second of the carbon-14 that a living tree has. The half-life of carbon-14 is 5730 years. How old is the bowl?
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← The graph shows the carbon-14 left in a sample against its age. A charcoal sample has one eighth of the carbon-14 of a living piece of wood. Which point of the curve fits this sample?The embryos of a fish and of a human both show slits on the sides of the neck. Haeckel said that this proves that an embryo repeats the adult stages of its ancestors. What did von Baer find? →
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