Aperson responding obsequiously to the order "jump! " would say
a. "no way."
c. "wait a minute."
b. "how high "

What body systems are involded in sleep homeostasis

Why is sustainable agriculture so important?

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.