RMBs are biconcave disc shaped whereas nerve cells are long and branched .why do cells have such different shapes? Pls help I would truly appreciate it!​

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.