They show chronological appearance of the different classes of organisms:
Correct answer: B. Fossils
- A. Vestigial structure
- B. Fossils
- C. Homologous structures
- D. Analogous structures
Explanation
Fossils are the preserved remains or traces of ancient organisms found in rocks or sedimentary layers. They offer valuable evidence of the chronological appearance of different classes of organisms over geological time. Fossils help reconstruct the evolutionary history of life on Earth, including the emergence, diversification, and extinction of various groups of organisms
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About Evolution
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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