Question

In humans, the pelvis and femur, or thigh bone, are involved in walking. In whales, the pelvis and femur shown in Figure 15–1 are
Question 5 options:

fossils that contain genetic mutations.


acquired traits necessary for an organism's survival.


examples of natural variation


vestigial structures that may have had an important function in the past

Answer 1

vestigial structures that may have had an important function in the past