Which term describes inherited similarities due to a common ancestor?

Which term describes inherited similarities due to a common ancestor?

• A. Vestigial organ
• B. Embryology evidence
• C. Homologous structures
• D. Speciation

Answer: (C)

Inheriting similar body parts from a common ancestor is shown by homologous structures. These are features that may look different or serve different functions in modern species, but their underlying anatomy—such as the same bone pattern in the forelimbs of humans, cats, whales, and bats—points to a shared origin. This shared design reflects descent with modification from a single ancestor and explains why related species can have similar structures even when they use them differently today. By contrast, vestigial organs are remnants of once-functioning parts, embryology evidence highlights similarities in development to indicate relatedness, and speciation is the formation of new species. So the term for inherited similarities due to a common ancestor is homologous structures.

Inheriting similar body parts from a common ancestor is shown by homologous structures. These are features that may look different or serve different functions in modern species, but their underlying anatomy—such as the same bone pattern in the forelimbs of humans, cats, whales, and bats—points to a shared origin. This shared design reflects descent with modification from a single ancestor and explains why related species can have similar structures even when they use them differently today. By contrast, vestigial organs are remnants of once-functioning parts, embryology evidence highlights similarities in development to indicate relatedness, and speciation is the formation of new species. So the term for inherited similarities due to a common ancestor is homologous structures.