What are the two waste products produced by cells?

The correct answer is water and carbon dioxide. During cellular respiration, cells break down glucose to release energy, a process that primarily occurs in the mitochondria. This process generates energy in the form of ATP, while water and carbon dioxide are produced as byproducts.

Carbon dioxide is released into the bloodstream and ultimately exhaled by the lungs, and water is used in various cellular functions or excreted. These waste products are essential for maintaining the body's homeostasis and ensuring that cells can efficiently manage their metabolic processes.

Other options include substances that do not represent the primary waste products from cellular respiration. For example, oxygen is actually a byproduct of photosynthesis rather than cellular respiration, whereas urea and ammonia are metabolic waste products primarily associated with the breakdown of proteins. Glucose and lipids are energy sources rather than waste products produced by cells.