The electron transport chain is part of which of the following processes?
- krebs cycle and fermentation
-photosynthesis and cellular respiration
-cellular respiration and glycolysis
-all of the above are correct

the most logical answer would be a

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.