Scientists have found that all living things, from bacteria to humans, rely on genetic codes to direct the functions of their cells. These genetic codes are contained in strings of nucleotides and have very similar structures. Which hypothesis for the origin of life on Earth is supported by this evidence?

Question

anonymous · Answer

Self-replicating RNA in the early Earth's oceans served as the basis for the DNA in cells today.

 Nucleotides and proteins that form the basis of life were originally carried to Earth from outer space by comets and meteorites.

 Greenhouse gases in the atmosphere produced amino acids that are used in cells today.

 Photosynthesizing bacteria provided oxygen that formed ozone which protected DNA from mutating into different forms.

anonymous · Answer

i think its C

anonymous · Answer

@abb0t @Abhisar @smartypantsjay @superhelp101

anonymous · Answer

@laurisve No, it is A. B is not thought to be the why life formed, D requires life to already be there (the bacteria), and C, well C is just wrong for various biological reasons and logical argument structure reasons.

anonymous · Answer

@laurisve One thing that helps is to know that the proteins that are involved in the replication of DNA, literally the proteins that extend DNA strings by adding the nucleotides, are all RNA polymerases.  This means that it is only logical that RNA came first and then DNA.

superhelp101 · Answer

oh sorry i got here late but yea it totally is A

anonymous · Answer

@laurisve I don't care for the question much myself.  It is way more complicated then just having self replicating RNA.  There also needed to be cell membranes, etc.

anonymous · Answer

get it @mrdoldum