Researchers concluded from the leg bones of the fossil shown in Figure 26-2 that Lucy was bipedal. Which of the following would also indicate that this hominine was bipedal?
a. broad rib cages
b. skulls with flat faces
c. skulls with rounded faces
d. bowl-shaped pelvises

Match each symbol with its description.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Based on the body structures of these animals, which two conclusions are scientifically the skeletal structure of the gorilla and chimpanzee suggest a common evolutionary ancestry. the dog and frog share a closer evolutionary ancestry than the gorilla and chimpanzee. the dog is more closely related to the frog than it is to the chimpanzee. all four organisms share a common vertebrate ancestor.