Which of the following is an example of operant conditioning? a. when a dog plays dead she gets a treat in order to encourage her to repeat the behavior b. when a cat learns to drool at the sound of a can opener c. when a dog refuses to play dead d. when a cat and a dog share the same water bowl.

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.

Use the numbers to place the companies in order of greatest comparative advantage to least comparative advantage in producing large tubes of toothpaste.

1)some people believe that certain drugs such as marijuana should be legalized. do you agree or disagree? 2)what impact might legalization have on forensic science as a field? which drug presents the greatest challenges to forensic science? why?