Which of the following animals is most likely to have an open circulatory system?

a. lizard
b. bird
c. dog
d. crab

What are phobias? and what are 5 common phobias that people have?

What effect do stimulants, such as cocaine, have on the nervous system? o a. stimulants change the activity of neurotransmitters. o b. stimulants mimic hormones and influence moods. o o c. stimulant|mchange how sensory information is processed. d. stimulants decrease brain activity.

Which of the following identifies the main culprit for america’s increasing weight gain?