The fossil shown are of a marine organism, in which of the three rock layers would you expect to find fossils of an organism that went extinct before the marine organism evolved? explain your answers

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

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the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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