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The diagram shown illustrates three structures from individuals who share a common ancestor. These are examples of

HUMAN
BIRD
WHALE
analogous structures
homologous structures
convergent evolution
crossing over

homologous structures

The correct answer is homologous structures.

Did you know?

Did you know that the diagram shown illustrates three structures - HUMAN, BIRD, and WHALE - that can help us understand the concept of evolutionary relationships? These structures are examples of either analogous structures, homologous structures, or the phenomenon known as convergent evolution. Analogous structures perform similar functions but have different origins, like a bird's wing and a butterfly's wing. Homologous structures, on the other hand, share a common ancestor but may have different functions, such as the arm of a human and the wing of a bird. Convergent evolution occurs when unrelated organisms independently develop similar traits in response to similar environmental pressures. It's through studying these structures and processes that we can unravel the fascinating story of life's diversity on Earth.