Natural Science CLEP Prep Practice Exam

Photosynthesis is the process by which plants use energy from the sun to convert carbon dioxide and water into glucose, a simple sugar, and oxygen as a byproduct. This glucose is the primary product of photosynthesis and serves as the basic building block for the plant's growth and energy. While oxygen is produced during photosynthesis, it is not the main product as it serves more as a waste product. Water and carbon dioxide are also essential components in photosynthesis, but they are not the main product that is produced. This is why the correct answer is C, glucose.