#Question id: 4941
#Unit 9. Evolution & Diversity of Life Forms
Which of the factors below weaken the hypothesis of abiotic synthesis of organic monomers in early Earthʹs atmosphere?
1. the relatively short time between intense meteor bombardment and appearance of the first life forms
2. the lack of experimental evidence that organic monomers can form by abiotic synthesis
3. Uncertainty about which gases comprised early Earthʹs atmosphere
#Question id: 4942
#Unit 9. Evolution & Diversity of Life Forms
Which of the following has not yet been synthesized in laboratory experiments studying the origin of life?
#Question id: 4943
#Unit 9. Evolution & Diversity of Life Forms
In what way were conditions on the early Earth of more than 3 billion years ago different from those on todayʹs Earth?
#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