Aerobic

"Between 1.5 and 2 billion years ago, based on molecular clock estimates, an ancestral cell engulfed a bacterium capable of aerobic respiration - burning oxygen to generate energy. Instead of digesting it, the cell kept it alive. The bacterium generated far more energy than the ho..."

"...genation Event was a mass extinction. But some organisms adapted. They evolved cellular machinery to tolerate oxygen, then to use it. Oxygen enables aerobic respiration, which produces 16 times more energy per glucose molecule than anaerobic respiration. Aerobic organisms could grow larger, move faster, a..."

"That waste product - the poison that killed most of Earth's life - became the foundation for everything that came after. Oxygen enabled aerobic respiration (cellular energy production using oxygen, far more efficient than oxygen-free metabolism)."

"The lungs contain far more alveolar surface area than minimally necessary; individuals with one lung can perform most activities, though aerobic exercise capacity is reduced. The heart maintains cardiac reserve; resting cardiac output represents only a fraction of maximum capacity, allowing th..."

"...nt tissues). Environmental conditions: Warm, moist conditions favor decomposition; cold or dry conditions slow it. Oxygen availability matters - aerobic decomposition is faster than anaerobic. Soil pH affects microbial activity. Nutrient content: Materials with high nitrogen content decompose fas..."