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BIOL 101 Study Guide ? Quiz 14




Question;Quiz Preparation Tasks:Define the phrases ?sedimentary rock? and ?index fossils?.Explain the meaning of the phrase ?Cambrian Explosion?.Explain the largest problem associated with evolving insects from sponges during a 5 million year time period.Describe how evolutionists have explained the apparent Cambrian explosion.Distinguish organs that are analogous to each other from organs that are homologous to each other.Explain the meaning of the term ?homologous? in the context of Darwin?s theory.Describe the structure and function of a homeobox gene and its gene product.Explain what controls whether a homeobox gene is transcribed or not.Describe the distribution of homeobox genes in the living world.Explain the challenge natural selection faces in creating a limb for an organism.Review the problem that the Cambrian explosion creates for the evolution of homeobox genes and the developmental pathways they specify.List the sorts of mutational changes required to evolve a vertebrate fin or arm from a primitive leg.Describe how both the theist and the naturalist come to the conclusion that most mutations occurring today are harmful.List three classes of mutations and describe the effect each class has on the evolutionary process.Give two possible definitions for a beneficial mutation.Define the phrase stabilizing selection and describe its role in relation to mutations occurring in a natural population.Explain one important value that disruptive selection can have to a natural population.Define directional selection and explain the effect it has on the distribution of phenotypes in a given population.Explain how a prolonged process of directional selection results in population weakness and sterility.State a major limitation in all real natural populations that prevents the potential power of directional selection from being demonstrated.List three stages of life history implied in the early pages of the Genesis record.Explain how Romans 8 and naturalistic evolution differ in their view of the adaptation of living things as we go forward in time.Explain why stabilizing selection is unable to completely prevent genomic decline in modern populations.Describe how speciation can be a deteriorative process rather than a creative one.


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