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4 Written questions

4 Multiple choice questions

  1. According to what, a severe ice age accounted for the limited diversiy and distribution of multicellular eukaryotes?
  2. In what process were prokaryotes swallowed by eukaryotes and became part of the eukaryote system (includes plastids and mitochondria)?
  3. What is the number of years it takes for 50% of a radioactive isotope to decay?
  4. What are aggregates of abiotically produced organic molecules surounded by a membrane?

4 True/False questions

  1. radiometric datingWhat involves the horizontal gene transfers between many bacterial and achael lineages?


  2. coloniesWhat are RNA catalysts that may have been used by RNA molecules to catalyze replication?


  3. pangeaWhat was the ancient supercontinents brought on by continental drift?


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