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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. According to what, a severe ice age accounted for the limited diversiy and distribution of multicellular eukaryotes?
  3. What are aggregates of abiotically produced organic molecules surounded by a membrane?
  4. What involves the horizontal gene transfers between many bacterial and achael lineages?

4 True/False questions

  1. ribozymesWhat are RNA catalysts that may have been used by RNA molecules to catalyze replication?

          

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

          

  3. magnetic reversalsWhat involves the horizontal gene transfers between many bacterial and achael lineages?

          

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