The hypothesis that there is a common ancestor to all living organisms is strengthened by what observation?

Question

Quizplus · Accepted Answer

The fact that almost all cells in all living organisms use DNA to direct their structure, function, and behavior suggests a common ancestor because it implies that DNA was present in the first living cell and has been passed down through generations to all living organisms. This supports the idea of a common ancestor because all living organisms have inherited the same genetic code.

The Hypothesis That There Is a Common Ancestor to All