Answer:
The first stage of aerobic respiration is glycolysis in which glucose molecule is broken down into two molecules of pyruvic acid. Thus, pyruvic acid is the intermediate product of aerobic respiration. The end products of anaerobic respiration are Lactic acid or ethanol and ATP molecules
The MRI shows every slice of the brain, a CT shows circulation, possibly the outside of the brain.
The second one hope that helps
Answer:
four billion years ago the earth had a layer of ozone gas