Physics, 06.03.2020 18:59, PlaneGamer5678

Rocks containing 450-million-year-old Ordovician fossils contain jawless fish. Younger Devonian rocks that are only 400-million-years-old contain fossils of jawless fish and fish with jaws. What idea does this evidence support?

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Rocks containing 450-million-year-old Ordovician fossils contain jawless fish. Younger Devonian rock...