- For example, some bacteria and fungi live in the deepest layers of the earth's crust.
- Some plants and animals including fish and various aquatic organisms survive in the ocean that covers a large part of the Earth's surface.
- Plants on the other hand, require sunlight for photosynthesis and live on the surface of the Earth, including vegetation in mountains, deserts, and forests.
- Some bacteria and other microorganisms have been found to survive even in extreme environments such as volcanic vents on the ocean floor.