#Question id: 4935
#XL - S Microbiology
Which gas was least abundant in Earthʹs early atmosphere, prior to 2 billion years ago?
#Question id: 4935
#XL - T Zoology
Which gas was least abundant in Earthʹs early atmosphere, prior to 2 billion years ago?
#Question id: 4940
#XL - S Microbiology
In their laboratory simulations of the early Earth, Miller and Urey observed the abiotic synthesis of
#Question id: 4940
#XL - T Zoology
In their laboratory simulations of the early Earth, Miller and Urey observed the abiotic synthesis of
#Question id: 4941
#XL - T Zoology
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
#XL - S Microbiology
Which of the following has not yet been synthesized in laboratory experiments studying the origin of life?