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What is the difference between homologous organs and analogous organs?

Homologous organs share structure and ancestry but differ in function (human arm vs whale flipper); analogous organs share function but not ancestry (bird wing vs insect wing).

Homologous organs share structure and ancestry but differ in function (human arm vs whale flipper); analogous organs share function but not ancestry (bird wing vs insect wing). A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.

Key point

homologous organs vs analogous organs

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