Final answer:
Plants get energy through photosynthesis, animals get energy through cellular respiration, and obligate anaerobes obtain energy through anaerobic respiration
Step-by-step explanation:
Plants get energy through a process called photosynthesis. In this process, they use sunlight, carbon dioxide, and water to produce glucose, which is a form of energy. This glucose is then used by cells in plants to carry out various functions.
Animals, on the other hand, get energy by consuming food. The cells in their bodies break down the food through a process called cellular respiration, which converts glucose into usable energy in the form of ATP.
An obligate anaerobe is an organism that cannot survive in the presence of oxygen. These organisms obtain energy through anaerobic respiration, where they break down nutrients in the absence of oxygen. An example of an obligate anaerobe is the bacterium Clostridium botulinum, which causes botulism. It obtains energy by fermenting carbohydrates in an oxygen-free environment.
Learn more about How cells obtain energy