Answer; Molluscs
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Fossils
Vestigial structures
Homologous structures
Molecular evidence
Comparative embryology
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Answer:
They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth. Later, scientists used absolute dating to determine the actual number of years ago that events happened. The geologic time scale is divided into eons, eras, periods, and epochs.
Explanation:
