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4 Written questions

4 Multiple choice questions

  1. What are RNA catalysts that may have been used by RNA molecules to catalyze replication?
  2. What involves the horizontal gene transfers between many bacterial and achael lineages?
  3. According to what, a severe ice age accounted for the limited diversiy and distribution of multicellular eukaryotes?
  4. The first multicellular organisms were what of autonomously replicating cells in which some cells became specialized?

4 True/False questions

  1. radiometric datingWhat is used to determine the ages of fossils?

          

  2. stromatolitesThe first multicellular organisms were what of autonomously replicating cells in which some cells became specialized?

          

  3. three-domain systemWhat are the oldest known fossils, rocklike layers of bacteria and sediment?

          

  4. half-lifeWhat is the number of years it takes for 50% of a radioactive isotope to decay?

          

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