Question

how does homologous organs explain evolution from a common ancestor​

Answer 1

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Homologous organs explains that the organisms comes from a common ancestor.

These are the types of organisms whose structures are same but has different functions.

Wings of insect, bird all demonstrates that they are homologous.

This is how homologous organs says that the organisms had a common ancestor.

An evolution called Divergent evolution is responsible for the arisement of the homologous structures or organs.