1.

    Which of the following is an example of an ancestral homology?

    A

    Almost all modern reptiles, birds and mammals have forelimbs, a trait they also share with contemporary amphibians

    B

    The first birds and all their descendant species have feathers, a trait that is unknown in any other group

    C

    Humans and many insect species have eyes

    D

    All of the above

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    2.

    Which of the following best describes the evolutionary process leading to analogous structures?

    A

    Common ancestry leading to shared traits

    B

    Random changes in gene frequencies within a population

    C

    Diversification of a single lineage into multiple forms

    D

    Different lineages evolving similar traits under similar environmental pressures

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    3.

    Karl Ernst von Baer's observations on vertebrate embryos primarily served to:

    A

    Completely disprove the evolutionary connection between species based on embryology.

    B

    Refine the understanding of embryological development and its relation to evolutionary history.

    C

    Emphasize that differences in later embryonic development are more significant than early similarities.

    D

    Demonstrate the profound impact of environmental factors on embryonic development.

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