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11.2 Determining evolutionary relationships

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  • Card 11 / 21:
    Dolphins and fish have similar body shapes. Is this feature more likely a homologous or analogous trait?

    Dolphins are mammals and fish are not, which means that their evolutionary paths (phylogenies) are quite separate. Dolphins probably adapted to have a similar body plan after returning to an aquatic lifestyle, and therefore this trait is probably analogous.

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Practice MCQ 5 FlashCards 3 Key Terms 8

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Source:  OpenStax, Concepts of biology univ. of west georgia. OpenStax CNX. Jan 03, 2014 Download for free at http://legacy.cnx.org/content/col11612/1.1
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