The hierarchy technique is an example of a mnemonic device that primarily emphasizes

Your brother walks over to the table to have breakfast and announces that he "slept like a baby." Because you know a lot about sleep, what will you point out about his statement?

a) Most babies sleep for a few hours and wake up about 6 to 8 times a day. b) Babies do not reach the deepest stages of sleep that are believed to be most restful. c) The sleep of a baby is so different that comparisons with adult sleep cannot be made. d) The brain of an infant works so hard to develop properly that they do not actually sleep.

What are two determinants of whether a species sleeps a great deal or a little?

a) activity level and need for food b) activity level and vulnerability to predators c) need for food and vulnerability to predators d) how intelligent the species is and where it lives