Describe what brain scans show during meditation; identify what meditators have been shown to have higher levels of; describe what meditation has been shown to do to our brain shape and size; describe results of the study where the flu virus was given to meditators and non-meditators.

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water