In order for the theory of common descent and the theory of natural selection to both be true, what can we infer about the genetic material for all life?
A) It must change very rarely.
B) It must vary spontaneously and randomly.
C) It must be transferrable between adults.
D) It must be transferable between different species.

Question

Quizplus · Accepted Answer

The theory of common descent suggests that all life on Earth shares a common ancestor, which means that all genetic material must have been passed down from that ancestor. The theory of natural selection suggests that the variations in genetic material provide the foundation for evolution, which means that genetic material must vary spontaneously and randomly. So, in order for both theories to be true, genetic material must vary spontaneously and randomly.

In Order for the Theory of Common Descent and the Theory