Question

which two statements summarize darwins theory? select all that apply a survival of the fittest. b all living species share common ancestors c natural selection explains how species change. d evolution explains how species change.

Explanation:

Darwin's theory includes the concept of natural - selection which is often referred to as survival of the fittest, and that natural selection explains how species change over time. The idea of all species sharing common ancestors is also part of his theory. While evolution is a broader concept and Darwin's work focused on the mechanism of natural selection within evolution.

Answer:

A. Survival of the fittest.
C. Natural selection explains how species change.