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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. they showed that organic molecules such as amino acids could be produced from inorganic molecules

3 True/False questions

  1. 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

          

  2. If you were using cladistics to build a phylogenetic tree of cats, which of the following would be the best outgroup?

    wolf
    domestic cat
    lion
    leopard
    tiger
    they provide positional information in the embryo

          

  3. 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.