CHAPTER 5 3) Energy from the sun enters an ecosystem when a plant uses sunlight to make sugar molecules in a process called .
4) The process of breaking down food to yield energy is called .

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive

cell/ tissue/ organ/ organ system/ body

essentially, one bacterial cell splits into two daugurer cells. bacterial offspring don't need or get care from their parents because they are in a sense their own parents. that said, some bacteria can and do depend on other bacteria especially in harsh environments such as bacterial microfilms in hot water tanks.