#Question id: 4945
#Unit 11. Evolution and Behavior
Which is a defining characteristic that all protobionts had in common?
#Question id: 4946
#Unit 11. Evolution and Behavior
Although absolute distinctions between the ʺmost evolvedʺ protobiont and the first living cell are unclear, biologists generally agree that one major difference is that the typical protobiont could not
#Question id: 4947
#Unit 11. Evolution and Behavior
The first genes on Earth were probably
#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?