WHAT DO THE DATA SUGGEST ABOUT HOW RELATED TURTLES ARE TO HUMANS COMPARED TUNA AND CHIMPANZEES?

Based on DNA sequence data, turtles and humans share a more recent common ancestor with each other than either does with tuna or chimpanzees. This is because turtles and humans are both amniotes, which means they have an egg that is encased in a membrane, while tuna are fish and chimpanzees are mammals. The split between the amniote and fish lineages occurred before the split between the amniote and mammal lineages, so turtles and humans share a more recent common ancestor with each other than either does with tuna or chimpanzees.