Evidence for Common Ancestry
9th Grade · Science · 60 min
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Learning Objective
I can explain how common ancestry is supported by evidence from comparative anatomy, embryology, and the fossil record.
- 1
The theory of evolution is a set of ideas that explains observations from embryology, paleontology, and other disciplines.
- 2
Homologous structures in different organisms, such as the forelimbs of whales, bats, and humans, suggest a shared ancestry.
- 3
Fossils of ancient cetaceans with hind legs and a pelvis show how whales evolved from land mammals, sharing an origin with bison and pigs.
