Answer :
Final answer:
When two species share a common ancestor, it means they evolved from one species in the past, showcasing a shared genetic heritage and diversification over time.
Explanation:
When two species share a common ancestor, it means that both species evolved from one species that lived in the past. This indicates that they have a shared genetic heritage and have undergone diversification over time. Traits that were present in the ancestral population and passed down are known as homologous traits.
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