5.+Organisms+maintain+a+dynamic+equilibrium+that+sustains+life.

MAJOR UNDERSTANDINGS 5.1a All living things grow, take in nutrients, breathe, reproduce, and eliminate waste. 5.1b An organism's external physical features can enable it to carry out life functions in its particular environment. 5.2a Plants respond to changes in their environment.  5.2b Animals respond to change in their environment.  5.2c Senses can provide essential information (regarding danger, food, mates, etc.) to animals about their environment. 5.2d Some animals, including humans, move from place to place to meet their needs. 5.2e Particular animal characteristics are influenced by changing environmental conditions.  5.2f Some animal behaviors are influenced by environmental conditions.  5.2g The health, growth, and development of organisms are affected by environmental conditions.  5.3a Humans need a variety of healthy foods, exercise, and rest in order to grow and maintain good health. 5.3b Good health habits include hand washing and personal cleanliness; avoiding harmful substances (including alcohol, tobacco, illicit drugs); eating a balanced diet; engaging in regular exercise.