Which of the following is evidence of a common ancestor?
Correct answer: D. This is the correct answer because all the given options are correct.
- A. Morphological similarities
- B. Fossil record
- C. Vestigial characteristics
- D. This is the correct answer because all the given options are correct.
Explanation
Morphological similarities mean similarities in structures and forms. These similarities give the idea that the organisms have evolved from common ancestors. Fossils provide a visual record in a complete series showing the evolution of an organism. Hence, it is evidence of the evolution of organisms from a common ancestor. Vestigial characteristics also provide evidence for the evolution of organisms from a common ancestor. Vestigial organs are historical remnants of structures that had important functions in ancestors but are no longer essential presently.
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Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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