Which of the following structures forms a protective layer between the environment and the inside of a body?
a. blood vessel
b. muscle
c. skin
d. bone

Dr. leung has been studying consistent trends in how males and females have selected their mates throughout the long history of humankind. dr. dauphine is most likely a(n) psychologist.

9. withdrawal occurs when alcohol is removed from the system after the brain a. adapted to the continued presence of alcohol b. become physically saturated with alcohol c. become impervious to the effects of alcohol d. begun to treat alcohol as a poison

Why is important to learn about the environment?