#Question id: 4944
#Unit 9. Evolution & Diversity of Life Forms
What is true of the amino acids that might have been delivered to Earth within carbonaceous chondrites?
#Question id: 4945
#Unit 9. Evolution & Diversity of Life Forms
Which is a defining characteristic that all protobionts had in common?
#Question id: 4946
#Unit 9. Evolution & Diversity of Life Forms
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 9. Evolution & Diversity of Life Forms
The first genes on Earth were probably
#Question id: 4948
#Unit 9. Evolution & Diversity of Life Forms
RNA molecules can both carry genetic information and be catalytic. This supports the proposal that
#Question id: 4949
#Unit 9. Evolution & Diversity of Life Forms
What probably accounts for the switch to DNA-based genetic systems during the evolution of life on Earth?