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4 Written questions

4 Multiple choice questions

  1. The first multicellular organisms were what of autonomously replicating cells in which some cells became specialized?
  2. What is used to determine the ages of fossils?
  3. What was the ancient supercontinents brought on by continental drift?
  4. What are RNA catalysts that may have been used by RNA molecules to catalyze replication?

4 True/False questions

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

          

  2. snowball earth hypothesisAccording to what, a severe ice age accounted for the limited diversiy and distribution of multicellular eukaryotes?

          

  3. stromatolitesWhat are the oldest known fossils, rocklike layers of bacteria and sediment?

          

  4. genetic annealingWhat involves the horizontal gene transfers between many bacterial and achael lineages?

          

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