Cellular Respiration and Photosynthesis
"Photosynthesis and cellular respiration are the two main processes performed by most living organisms to obtain usable energy from nature. While photosynthesis is performed by most plants who can prepare their own food, most animals fulfill their energy requirements through cellular respiration."
"Cellular respiration takes place in the same way in both plants and animals. Living cells obtain the products of photosynthesis (sugar molecules) and undergo cellular respiration to produce ATP molecules. Some cells respire aerobically, using oxygen, while others undergo anaerobic respiration, without using oxygen. The process involves a set of chemical reactions to convert chemical energy from the glucose molecules into ATP molecules."
"Photosynthesis takes place in the cells of plant leaves in structures called chloroplasts, which contain chlorophyll. The plant cells absorb light from the sun through the chlorophyll pigment, and using water and carbon dioxide obtained from the environment, undergo a series of chemical reactions to produce carbohydrate molecules."
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Read more at Buzzle: http://www.buzzle.com/articles/photosynthesis-and-cellular-respiration.html