Question

question 3 (multiple choice worth 4 points) (01 03r mc) which hypothesis helps to explain why all organisms share the same genetic code? early earth had an abundance of volcanoes and lacked an ozone layer. deep - sea vents provided the energy needed for the first organic compounds to form. microspheres divided and share common characteristics with present - day cells. self - replicating rna molecules passed on genetic information

Explanation:

The RNA world hypothesis suggests that self - replicating RNA molecules were the first genetic material. As life evolved, this common genetic information (in the form of RNA initially) could have been passed on and eventually led to the universal genetic code seen in all organisms today.

• The first option about volcanoes and the ozone layer is about the early Earth's physical environment, not directly related to the genetic code.
• The second option about deep - sea vents is about the energy source for organic compound formation, not the genetic code.
• The third option about microspheres is about early cell - like structures, not the genetic code.

Answer:

Self - replicating RNA molecules passed on genetic information.