The basic structural unit of the body is the
a.) heart
b.) brain
c.) cell
d.) tissue

Prescription drugs account for 25% of all healthcare-related costs. true or false

True or false. repeated drug use may lead to drug tolerance which occurs when a user requires larger amounts of the drug to achieve the desired effect.

By 2 weeks after fertilization the morula has implanted into the uterine lining and transforms into a(n) . this time is when the , or the organ that will provide nourishment to the fetus by exchanging nutrients and waste products, begins to develop.