Gram positive bacteria have a thick peptidoglycan cell wall and appear purple, while Gram negative bacteria have a thin peptidoglycan cell wall and appear red
Differences between aerobic respiration and anaerobic respiration:
Aerobic respiration uses O2 as the final electron acceptor, but anaerobic respiration does not
Aerobic respiration includes the link reaction, Krebs cycle, and ETC (oxidative phosphorylation) inside mitochondria, while anaerobic respiration does not