rganisms use and produce gases in 1_______ and 2________ . These gases flow through organisms and the environment in a cyclic process called Oxygen Carbon dioxide cycle. It shows the interdependence among organisms. When plants photosynthesize, they use 3______ and produce 4_______ . Oxygen produced by plants in photosynthesis is being used by animals when they respire and turn into carbon dioxide. Animals take in oxygen from the atmosphere and give-off carbon - dioxide during respiration. During respiration, plants use oxygen and produce 5_______ .
