The theory of common descent states that all modern organisms                   . a. can change in response to environmental change; b. descended from a single common ancestor; c. descended from one of many ancestors that originally arose on Earth; d. have not evolved; e. can be arranged in a hierarchy from 'least evolved' to 'most evolved'

Video transcript

Hello, everyone here. We have a question that says which of the following describes the theory of common descent? According to common descent. All species are descendants of a single ancestor. So our answer is a all living organisms are descendants of a single ancestor, and this claim is evident from the gene sequences, which so a significant number of conserved regions across organisms genomes. Thank you for watching. Bye.