9781422287712

Words to Understand

perceive: See, hear, or sense something. evolved: Changed over a very long time. species: A certain kind of life form that is capable of breed- ing to produce new life forms of the same type. survival mechanisms: Ways that life forms have evolved to survive in their environment.

Words to Understand: distract: Take your attention away from what you’re supposed to be doing. community: The group of people you live with or nearby or with whom you share something in common, such as religion or ethnic back- ground. psychologists: Experts on the human mind and emotions. symptoms: Signs that you have a disease. For example, a fever is a commo symptom of the flu. insomnia: Not being able to sleep. word: Definition. word: Definition. word: Definition. word: Definition.