Information and IdeasVery hardEvidence that a fossil was misidentified
Information and Ideas practice question
A palaeontologist argues that a fossil long identified as a fish is in fact an early amphibian.
Which finding, if true, would most directly support the claim?
- A. A scan of the fossil shows finger bones inside what had been taken for fins, a feature found in amphibians and never in fish.Correct
- B. The fossil was found in rock that formed in shallow water.
- C. The fossil is about 30 centimetres long.
- D. Amphibians and fish share a common ancestor.
Answer: A. A scan of the fossil shows finger bones inside what had been taken for fins, a feature found in amphibians and never in fish.
Fingers, not fins.
Why the other answers are wrong
- B. The fossil was found in rock that formed in shallow water.
- Shallow water suits either.
- C. The fossil is about 30 centimetres long.
- Size does not distinguish them.
- D. Amphibians and fish share a common ancestor.
- Shared ancestry does not identify this fossil.
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