All insects live inside a hard skeleton (true or false)?

An easy way to calculate the amount of energy available at each level is to what?

How can you tell the difference between rough er from smooth er?

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.