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4 Written questions

4 Multiple choice questions

  1. What is the number of years it takes for 50% of a radioactive isotope to decay?
  2. What are RNA catalysts that may have been used by RNA molecules to catalyze replication?
  3. What is used to determine the ages of fossils?
  4. What are the oldest known fossils, rocklike layers of bacteria and sediment?

4 True/False questions

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


  2. three-domain systemWhat places the three major evolutionary lineages into a superkingdom taxon?


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


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