#Question id: 4948
#Unit 11. Evolution and Behavior
RNA molecules can both carry genetic information and be catalytic. This supports the proposal that
#Question id: 4949
#Unit 11. Evolution and Behavior
What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?
#Question id: 4956
#Unit 11. Evolution and Behavior
Which measurement would help determine absolute dates by radiometric means?
#Question id: 4957
#Unit 11. Evolution and Behavior
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: 4958
#Unit 11. Evolution and Behavior
What is true of the fossil record of mammalian origins?
#Question id: 4961
#Unit 11. Evolution and Behavior
An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to