Biology, 15.12.2020 17:20 thutch1950oww9q0

Index fossils help scientists estimate the age of a rock because index fossil species only existed for a relatively short time. What happened to
the species have are now used as index fossils? *
A. They became extinct.
B. They changed their diets.
ОО
C. They hid in marine sediments.
D. They migrated of new environment

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