Help plz Vestigial structures, such as the appendix, are body parts that don't seem to serve a
purpose in humans. How are vestigial structures important evidence for evolution?

A. They provide clues about structures that were important to our ancestors.
B. They provide clues about what future generations of humans will look like.
C. They help identify body parts in fossils.
D. They are evidence that humans used to eat different foods.

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.