Which one of the following is not considered an important step in the origin of life on Earth? o the abundance of chemical elements like carbon, oxygen and hydrogen o the protective ozone layer that shields us from harmful ultraviolet radiation o the presence of a liquid medium like water o reactions that are made much more efficient and faster due to catalysts o the presence of monomers like amino acids to form polymers.

1. Which one of the following is not considered an important step in the origin of life on Earth?
o the abundance of chemical elements like carbon, oxygen and hydrogen
o the protective ozone layer that shields us from harmful ultraviolet radiation
o the presence of a liquid medium like water
o reactions that are made much more efficient and faster due to catalysts
o the presence of monomers like amino acids to form polymers