The life span range by nation is 100 years

According to D.M. Clark's research, people with anxiety sensitivity would likely be frightened most by

a. stomach discomfort. b. heart palpitations. c. foot pain. d. insomnia.

Because dogs do not need to be conditioned to salivate to food, salivation to food is a(n)

A) conditioned response. B) conditioned reflex. C) unconditioned response. D) neutral response.