A student built a circuit based on a diagram. His teacher gave him an activity sheet where he filled in his purpose, method, mat
erials, results, and conclusion. What made the scientific process incomplete? A. The student did not change any variables
B. The student learned how to build a circuit
C. The student used a set list of materials
D. The student made a conclusion after collecting evidence
Cellular respiration that proceeds in the absence of oxygen is anaerobic respiration. Cellular respiration that proceeds in the presence of oxygen is aerobic respiration. Anaerobic respiration evolved prior to aerobic respiration.
