Evidence of Common Ancestry

43 questions on this block. Tap an answer and it moves on by itself — correct answers advance immediately, misses hold a few seconds so you can read why.

Two rules carry most of this block Same bones, different jobs = a shared ancestor. Fewer DNA or protein differences = closer relatives.

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Different kinds of evidence point to the same conclusion: living things share common ancestors. The more similar two species are, the more recently they shared one.

Part 1Comparative anatomy

Part 2Embryology

Part 3The fossil record

Part 4Molecular evidence

Part 5Biogeography

Part 6Applying the models

Evidence of Common Ancestry

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