(singular: alga) diverse group of aquatic organisms, the largest of which are seaweeds.
(adenosine triphosphate) chemical found in most living cells and used for energy.
(singular: bacterium) single-celled organisms found in every ecosystem on Earth.
series of reactions that take place during photosynthesis, where carbon dioxide and water from the atmosphere are converted into sugar.
greenhouse gas produced by animals during respiration and used by plants during photosynthesis. Carbon dioxide is also the byproduct of burning fossil fuels.
smallest working part of a living organism.
part of the cell in plants and other autotrophs that carries out the process of photosynthesis.
negatively charged subatomic particle.
"simple sugar" chemical produced by many plants during photosynthesis.
smallest physical unit of a substance, consisting of two or more atoms linked together.
chemical element with the symbol O, whose gas form is 21% of the Earth's atmosphere.
process by which plants turn water, sunlight, and carbon dioxide into water, oxygen, and simple sugars.
organism that produces its own food through photosynthesis and whose cells have walls.