There are no adults that have ADHD.

Which of the following is the best example of hostile aggression?

A) Bernie is angry at his mother and screams at her, "I hate you!" B) Walter is angry and ignores a friend's request for a favour until he calms down. C) Angela threatens her younger brother to force him to give up his toy. D) A lineman sacks a quarterback to put him out of the game. E) An angry driver loses control and runs his car into a ditch.

What is the approximate life expectancy of individual taste receptor cells?

a) 1–2 days b) 10–14 days c) 1–2 months d) 1 year