Question

an experiment was conducted in a closed system for five days. the percent of oxygen and carbon dioxide was measured daily and recorded in the table.

day 1	day 2	day 3	day 4	day 5
% o₂	25	40	50	60	75

what process most likely occurred that would explain the results?
○ glycolysis
○ anaerobic respiration
○ photosynthesis
○ aerobic respiration

Explanation:

In a closed - system experiment, as oxygen is consumed and carbon dioxide is produced over time, aerobic respiration is the most likely process. Photosynthesis would increase oxygen levels. Glycolysis alone does not account for the oxygen - carbon dioxide exchange over multiple days. Anaerobic respiration does not consume oxygen in the way shown by the data.

Answer:

aerobic respiration