An emu is a flightless bird that still has wings. These wings are an example of:

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Quizplus · Accepted Answer

Vestigial structures are traits or organs that are still present in a species but have lost their original function. Emus' wings are a vestigial structure because they are not used for flight but are still present in the species. Analogous structures refer to similar structures in different species that serve the same function but are not derived from a common ancestor. Homologous structures refer to similar structures in different species that are derived from a common ancestor. Adaptation refers to a trait or characteristic that helps an organism survive in its environment. Mutation refers to a change in the DNA sequence that can lead to a new trait or characteristic.

An Emu Is a Flightless Bird That Still Has Wings