1. What is the basic difference between locomotion in the fish
and that of the tetrapods?

2. Why are there differences in the axial and appendicular
skeleton between fish and tetrapods?

3. Why does the pigeon have a large breastbone associated with
the thoracic vertebrae ribs?

4. Why is the human pelvic girdle so strong and robust? Why is
the human spine not as flexible as the perch’s?

5. What adaptations to a bipedal upright lifestyle are evident
in the human skeleton?