#Question id: 4949
#Section 2: Evolution
What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?
#Question id: 4951
#Section 2: Evolution
The synthesis of new DNA requires the prior existence of oligonucleotides to serve as primers. On Earth, these primers are small RNA molecules. This latter observation is evidence in support of the hypothesized existence of
#Question id: 4952
#Section 2: Evolution
Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth. Which of these questions is currently the most problematic and would have the greatest impact on our understanding if we were able to answer it?
#Question id: 4953
#Section 2: Evolution
Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth. Which graph below, if the results were produced abiotically, would have the greatest promise for revealing important information about the origin or Earthʹs first genetic system?
#Question id: 4957
#Section 2: Evolution
How many half-lives should have elapsed if 6.25% of the parent isotope remains in a fossil at the time of analysis?
#Question id: 7696
#Section 2: Evolution
The following question refers to the following phylogenetic trees. Which tree depicts the microsporidians as a sister group of the ascomycetes?