Which of the following is not key evidence in support of the idea that all life today shares a common ancestor?
A)All life builds proteins from the same amino acids and uses ATP to store energy in cells.
B)All life uses DNA and the same genetic code.
C)We have identified fossils of the first life forms that ever existed on Earth.
D)Mapping of gene sequences shows how life is all related.

Question

Quizplus · Accepted Answer

The existence of fossils of the first life forms on Earth does not necessarily support the idea that all life today shares a common ancestor. It is possible that these early life forms were not directly ancestral to all life today or that there were multiple ancestral lineages that gave rise to different groups of organisms. The key evidence in support of the idea of a common ancestor is the shared genetic code and biochemical processes that are found in all living organisms.

Which of the Following Is Not Key Evidence in Support