Archaeopteryx is regarded as a connecting link between
- A. fishes and amphibians
- B. amphibians and reptiles
- C. reptiles and birds
- D. reptiles and mammals
Explanation
Archaeopteryx had feathers and a wishbone like a bird but also teeth in its jaws, a long bony tail and clawed fingers like a reptile, so it carries characters of both classes. Such transitional fossils are exactly what common descent predicts and what a theory of separately created fixed types does not. The fish to amphibian link is filled by fossils such as Ichthyostega instead.
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