The first living organisms that arose on earth are believed to have evolved according to a series of steps represented by the appearance of specific molecules.Of the molecules listed,which one would most likely have appeared fourth?
A)hydrogen cyanide
B)ATP
C)Ribozymes
D)DNA
E)amino acids

Question

Quizplus · Accepted Answer

The steps hypothesized in the origin of life theory suggest that the fourth step would be the appearance of RNA molecules capable of self-replication, also known as ribozymes. This would come after the appearance of simpler molecules such as amino acids, hydrogen cyanide, and ATP, but before the formation of more complex molecules such as DNA.

The First Living Organisms That Arose on Earth Are Believed