B

Bahring

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    as most toothed whales do today,
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    as most toothed whales do today,

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    he Dorudontinae, which contained at least six species,
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    he Dorudontinae, which contained at least six species,

    similar fossils have been found extensively in New Zealand and even Antarctica
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    similar fossils have been found extensively in New Zealand and even Antarctica

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    which lived between 38
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    which lived between 38

    narrow ventricle and still had hind limbs
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    narrow ventricle and still had hind limbs

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    The earliest cetaceans
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    The earliest cetaceans

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    such as a thickened subcutaneous fat layer
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    such as a thickened subcutaneous fat layer

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    which is called "secondary entry"
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    which is called "secondary entry"

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    all vertebrates evolved from fish in the ocean 300 million years ago
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    all vertebrates evolved from fish in the ocean 300 million years ago

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    4 million years ago, and gradually evolved
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    4 million years ago, and gradually evolved

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    gave rise to horizontal caudal fins
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    gave rise to horizontal caudal fins

    hey formed were
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    hey formed were

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    DNA sequencing
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    DNA sequencing

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    The physical structure
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    The physical structure

    The most recent common ancestor
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    The most recent common ancestor

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    smaller than that of baleen whales
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    smaller than that of baleen whales

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    diverged 34 million years ago.
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    diverged 34 million years ago.

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