Which piece of evidence did Darwin observe during his 5-year journey aboard the HMS Beagle?

A) A South American species of finch is most likely the ancestor of the Galápagos Island finches.
B) Species do not change over time.
C) The environment can change the phenotype of an organism and this is heritable.
D) All species share the same basic genetic blueprint.
E) The earth is approximately 4.6 billion years old.

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Stephanie Hernandez · Accepted Answer

Final Answer : A, Explanation :  During his journey, Darwin observed that the finches on the Galápagos Islands had distinct beak shapes depending on their diet. He also observed a similar species of finch on the South American mainland that had a beak shape similar to one of the Galápagos finch species. This led Darwin to hypothesize that a common ancestor had adapted to different environments and evolved into different species with different beak shapes.

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