One type of benign breast tumor is a

Why hasn't anyone collected the Amazing Randi's $1,000,000?

(a) there is no credible evidence for the existence of paranormal effects (b) the scientific community has accepted that telepathy exists, but Randi is unconvinced (c) because, as the photographer said, the force is "tricky" (d) when ESP is put under test, the bad vibes caused by the skeptics make it go away

When you walk up to a light switch, you might notice that it has two positions – "On" and "Off." If you lift the switch enough, the light turns on. If you do not, the light stays off. This is very similar to the ________ principle of the human neuron

a. on/off b. all-or-none c. inhibition-stimulation d. dendritic limitation