BIOLOGY 1M03 Lecture Notes - Lecture 6: Natural Experiment, Rifampicin, Allele Frequency
21 Sep 2015
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Biology 1m03 - lecture 6 - evolution by natural selection (continued) Developmental homology is known as similarities in embryonic traits. An example of this type of homology is the gill pouches found during embryonic development in chicks, humans, and cats. Structural homology refers to similarities in adult morphologies (appearances of adults). An example of this type of homology is the common structural plan found in the bones of the limbs in vertebrates (animals with a backbone). Many traits are similar in species because of the theory of having a common ancestor. If species were created independently of one another, these similarities might not have occurred. The homology of structural homology is assessed on the basis of three critea: The prediction that species are not static, but dynamic is supported by the following evidence: Fossil (extinct) species frequently resemble living species found in the same area. Transitional features document change in traits through time.
