#Question id: 4932
#Section 2: Evolution
Which of the following is the best hypothesis regarding origins of nucleic acids?
#Question id: 4933
#Section 2: Evolution
What structure do protocells have in common with current cells?
#Question id: 4934
#Section 2: Evolution
What is another hypothesis regarding the formation of polymers such as proteins and nucleic acids?
#Question id: 4935
#Section 2: Evolution
Which gas was least abundant in Earthʹs early atmosphere, prior to 2 billion years ago?
#Question id: 4940
#Section 2: Evolution
In their laboratory simulations of the early Earth, Miller and Urey observed the abiotic synthesis of
#Question id: 4941
#Section 2: Evolution
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