Which one of the following drugs is considered a "gateway drug"? a. codeine b. heroin c. cocaine d. tobacco

Ronald is concerned about exposure to antibiotics and hormones in our food supply. which type of wellness does this affect?

Which disease is caused by a buildup of plaque in blood ves

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.