If or extra species share a completely unique bodily feature, inclusive of a complex bone structure or a body plan, they will all have inherited this option from a common ancestor. Bodily features shared due to evolutionary history (a commonplace ancestor) are stated to be homologous.
Homologous systems are similar physical capabilities in organisms that proportion a commonplace ancestor, however, the capabilities serve absolutely specific capabilities.
For example, the bones in the front flipper of a whale are homologous to the bones within the human arm. These structures aren't analogous. The wings of a butterfly and the wings of a chook are analogous but no longer homologous.
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