SAT Biology Subject Test Practice Questions

Answer: E, Chimpanzee. The chimpanzee is most likely to share a common ancestor with humans.

Key Takeaway: Of the options given, the chimpanzee shares more in common with humans than the others. Like humans, it is an air-breathing, warm-blooded vertebrate that has mammary glands. No other animal among the choices above share all three traits with humans. It is therefore more likely to have descended from a common ancestor with humans.