POWER WORDS (adapted from the Yahoo! Kids Dictionary)

pheromone A chemical secreted by an animal, especially an insect, that influences the behavior or development of others of the same species.

chemical A substance with a distinct molecular composition that is produced by or used in a chemical process.

neurogenetics The study of the genetic basis of the nervous system.

nervous system The system of cells, tissues and organs that regulates the body’s responses to internal and external stimuli. In vertebrates it consists of the brain, spinal cord, nerves, ganglia and parts of the receptor and effector organs