#Question id: 4934
#Unit 11. Evolution and Behavior
What is another hypothesis regarding the formation of polymers such as proteins and nucleic acids?
#Question id: 4935
#Unit 11. Evolution and Behavior
Which gas was least abundant in Earthʹs early atmosphere, prior to 2 billion years ago?
#Question id: 4940
#Unit 11. Evolution and Behavior
In their laboratory simulations of the early Earth, Miller and Urey observed the abiotic synthesis of
#Question id: 4941
#Unit 11. Evolution and Behavior
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 11. Evolution and Behavior
Which of the following has not yet been synthesized in laboratory experiments studying the origin of life?
#Question id: 4943
#Unit 11. Evolution and Behavior
In what way were conditions on the early Earth of more than 3 billion years ago different from those on todayʹs Earth?