_____ came up with the law of effect after studying hungry cats in his puzzle box

What reason do smokers often cite for their reluctance to quit?

a) fear of gaining weight b) they have tried and failed before c) peer pressure to maintain the habit d) lowered self-esteem that will accompany quitting

There is a ______ percent overlap in genetic heritage between each parent and his or

her offspring. a. 25 c. 75 b. 50 d. 100