Final answer:
Two examples of vestigial structures are the human tailbone and the whale pelvis. These structures have lost their original function and no longer serve a purpose in the organisms that possess them.
Step-by-step explanation:
Two examples of vestigial structures are the human tailbone and the whale pelvis. The human tailbone, also known as the coccyx, is a small bone at the bottom of the vertebral column that is the remnant of a tail that our ancestors used for balance and movement. The whale pelvis is a set of small bones found inside the body of whales, which were once attached to hind limbs. These structures are considered vestigial because they have lost their original function and no longer serve a purpose in the organisms that possess them.