History of Life on Earth Video Lessons

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Problem: Which evidence supports the hypothesis that four-limbed animals came from fish? Select all that apply.1) DNA analysis shows that fish are tetrapods’ closest relatives.2) Both fish and four-limbed animals are vertebrates.3) Fossil evidence shows there have always been four-limbed animals on Earth.4) The fossil record shows more and more tetrapod-like fish before the appearance of tetrapods about 365 million years ago.5) Fish and four-limbed animals have very similar embryos.

FREE Expert Solution

1) DNA analysis shows that fish are tetrapods’ closest relatives. → TRUE

The closes relative of tetrapods are lungfishes.


2) Both fish and four-limbed animals are vertebrates. → TRUE

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Problem Details

Which evidence supports the hypothesis that four-limbed animals came from fish? Select all that apply.

1) DNA analysis shows that fish are tetrapods’ closest relatives.

2) Both fish and four-limbed animals are vertebrates.

3) Fossil evidence shows there have always been four-limbed animals on Earth.

4) The fossil record shows more and more tetrapod-like fish before the appearance of tetrapods about 365 million years ago.

5) Fish and four-limbed animals have very similar embryos.

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