Green plants in a sunny meadow and sulfur bacteria deep-sea volcanic vent are alike in that they both utilize different processes to convert light energy into chemical energy.

- Green plants use the energy from sunlight to convert carbon dioxide and water into sugars through the process of photosynthesis.

- Sulfur bacteria use the energy from the chemical reactions that occur deep-sea volcanic vents to convert inorganic compounds, such as hydrogen sulfide, into organic compounds.