Which of the following pieces of evidence most strongly supports the common origin of all life on Earth?
A) All organisms require energy.
B) All organisms use essentially the same genetic code.
C) All organisms reproduce.
D) All organisms show heritable variation.
E) All organisms have undergone evolution.

Question

Quizplus · Accepted Answer

The fact that all organisms use essentially the same genetic code provides strong evidence for a common origin of all life on Earth. This is because the genetic code is the language by which DNA is read and translated into proteins, and is shared by all living organisms. The similarity in the genetic code across all life forms strongly suggests that they all descended from a common ancestor.

Which of the Following Pieces of Evidence Most Strongly Supports