How rock and fossil layers been used to construct a complete phylogenetic tree

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

What molecules does hemoglobin decay into over time

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade