A body part that is reduced in size and no longer has a useful function in an organism is called a(n)
A. vestigial structure
B. fossilized structure
O
C. homologous structure
a
D. embryonic structure

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger