In order for the theory of common descent and the theory of natural selection to both be supported, 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 transferable 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, implying that genetic material must have varied spontaneously and randomly over time. The theory of natural selection relies on this variation to occur for the process of evolution to take place. Thus, choice B is the correct answer as it supports both theories. Choices A, C, and D do not necessarily imply the variation required for common descent and natural selection to be supported.

In Order for the Theory of Common Descent and the Theory