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4 Written questions

3 Multiple choice questions

  1. they provide positional information in the embryo
  2. 4.5 billion years ago ... 3.9 billion years ago
  3. Ivy leaf and pine needle

3 True/False questions

  1. Phylogeny is the evolutionary history of related groups of organisms. Organisms are grouped into taxa based on homologous characteristics, shared traits that result from common ancestry. Which statement is true?

    Homologous structures look the same and serve the same function, but they differ in evolutionary origin and structure.
    The term "monophyletic" refers to a taxon that includes an ancestral species and all of its descendants.
    Ancestral traits are always simpler than derived traits.
    The term "monophyletic" refers to a taxon that includes an ancestral species and all of its descendants.

          

  2. Evolution works by _____.

    "tinkering" with existing structures
    predicting the future
    molding the environment to conform to the organisms living in it
    constantly increasing complexity
    converging on a particular phenotype
    "tinkering" with existing structures

          

  3. Radiometric dating _____.

    allows us to determine an absolute, errorless date
    only works on rocks younger than 75,000 years
    allows us to indirectly date fossils up to billions of years old based on minerals in surrounding volcanic strata
    relies on the fact that the daughter isotope decays to the parent isotope at a constant rate
    can be used to directly date fossils in sedimentary rock
    allows us to indirectly date fossils up to billions of years old based on minerals in surrounding volcanic strata