Evolution Question
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The earliest amphibian fossils scientists have found are 363 million years old. They have also discovered fossils of fish that could use fins to crawl on the bottom of the body of water that are 380 million years old. In 2004, while digging in rocks dated 375 million years old, they found a fossil called Tiktaalik roseae, which had scales, fins, and gills like a fish, but also had a neck, ribs, a flat head, bony fins, and an ear notch like an amphibian. What term best describes the fossil Tiktaalik?
- index fossil
- mutant species
- nightmare
- clade
- transitional form