Index fossils are found throughout the world and come from organisms which existed during limited periods of geologic time. Which of the following best describes what index fossils can be used to determine?
A.
the age of a layer of rock
B.
when an organism first appeared on Earth
C.
how an organism evolved over time
D.
the way an organism went extinct
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Home » Chemistry » Index fossils are found throughout the world and come from organisms which existed during limited periods of geologic time. Which of the following best describes what index fossils can be used to determine? A. the age of a layer of rock B.