chapter 1

• What is biology?


  The study of organisms
• Define organism


  A living thing
• Define growth


  Permanent increase in size and dry mass
• Define movement


  an action by an organism or part of an organism causing a change of position or place
• Define sensitivity


  The ability to detect changes in the environment and respond to them
• Define excretion


  The removal of waste products of metabolism and substances in excess of requirments
• Define reproduction


  the process that makes more of the same kind
• Define nutrition


  taking in materials for energy, growth and development
• define respiration


  the chemical reaction in cells that breaks down nutrient molecules and releases energy for metabolism