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What can be Learned with
Evidence from Fossils?
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Scientists have known for a long time that life on Earth began in water. After over 3 billion years, animals (amphibians) were moving from water to land.
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But finding the fossil evidence for that transition was difficult.
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The scientists who discovered… …Tiktaalik
…Tiktaalik
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Glyptolepis From fins….
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Panderichthys … to one bone, two bones, two blobs…
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Tiktaalik … to one bone, two bones, sort of blobs and digits…
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And others … with one bone, two bones, lots of blobs and digits.
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Look familiar? Do you see a pattern here? This approach in finding evidence for the common ancestry between living organisms is referred to a comparative anatomy.
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Is there evidence in the diagrams to indicate these organism have a common ancestor? Use comparative anatomy to answer this question. Then match the diagram letter to the type of animal. SPuD: B A D C Animal word bank: bird dog human whale
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