Scientists often use the analogy of a tree to describe the history of life on Earth. All organisms alive today, including archaea, bacteria, and eukaryotes, can trace their development to the same common ancestor or set of ancestors, which forms the base of the tree. Which statement provides the strongest evidence for the conclusion that all living things share common ancestry? a. All living things perform either cellular respiration or photosynthesis

b. All living things use DNA as a genetic code to transmit information

c. All living things have vestigial structures that are remnants of structures found in ancestral species.

d. All living things are made of cells with approximately the same composition, size, shape, and function