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What are Homologous structures in Biology? PDF | Download eBooks

Learn Homologous structures definition in biology with explanation to study “What are Homologous structures”. Study homologous structures explanation with biology terms to review biology course for online degree programs.

Homologous structures Definition

  • Homologous structures are those that represent variations on a structural theme that was present in their common ancestor.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson

Homologous structures Explanation

A homologous structure is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor. In other words, it's when very different animals have bones that appear very similar in form or function and seem to be related. A dolphin's flipper, bird's wing, cat's leg, and the human arm are considered homologous structures.

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