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4 Written questions

3 Multiple choice questions

  1. "tinkering" with existing structures
  2. RNA has both information storage and catalytic properties.
  3. 4.5 billion years ago ... 3.9 billion years ago

3 True/False questions

  1. Hox genes are thought to play an important role in the development of different morphologies because _____.

    they affect the timing of reproductive development in the organism
    they paved the way for the development of multicellular organisms
    they affect the order of genes on certain chromosomes
    they affect the timing of development in the embryo
    they provide positional information in the embryo
    they provide positional information in the embryo

          

  2. 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

          

  3. Which of these are homologous structures?

    There are no homologous plant structures.
    Ivy leaf and pine needle
    Plant root and plant leaf
    "tinkering" with existing structures

          

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