Sandra believes that alien beings on unidentified flying objects (UFO’s) are beaming thoughts into her head. She is suffering from
A) an obsession
B) a hallucination
C) a delusion
D) a compulsion

How was the climate when the ambulocetus was alive

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

What causes darkening of the skin as melanin production increases