The midpiece of the mature sperm contains mitochondria that provide metabolic energy for the trip to the egg. fructose (simple sugar) is used as fuel by the sperm. from where is this fructose secreted?

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.