Why is biosynthesis unlikely to occur today as it did in Earth's youth?
A) Living organisms have altered oceanic and atmospheric conditions
B) There is less available oxygen in the atmosphere
C) Ozone is less protective from the sun's influence
D) The ocean's do not contain enough free iron

Question

Quizplus · Accepted Answer

Living organisms have altered the ocean and atmosphere, and those changes are not consistent with any new origin of life. Plants are now producing oxygen which is then added to the atmosphere. Oxygen, in the form of Ozone, also blocks the most dangerous wavelengths of light from reaching the surface of the ocean. Additionally, the many tiny organisms present today would gladly scavenge on any large organic molecules. Information can be found in the section Life Probably Originated in the Ocean.

Why Is Biosynthesis Unlikely to Occur Today as It Did