Describe how they take in substances, grow, reproduce, and respond to stimuli. Explain how different structures perform specific functions in order for the organism to meet its need for survival. Flow of Matter and Energy 1. All living organisms interact with the living and non-living parts of their surroundings to meet their needs for survival. These interactions lead to a constant exchange of matter and energy.
Plants derive energy from the sun for growth and survival.
Animals eat plants or other animals that have also eaten plants to satisfy energy needs. When plants and animals die, they are eaten by decomposers. Develop a list of food items offered for lunch by the school cafeteria. Work in groups to construct a food chain that traces the source of each food item from plant origin to the product eaten. Regulation and Behavior 1.