Which of the following is a starting compound during cellular respiration? carbon dioxide glucose mitochondria water

Cellular respiration involves use of glucose and oxygen to generate energy inform of ATP and carbon dioxide. ATP is then used for various activities of a cell. The process takes place in the mitochondrion and oxygen acts as the electron acceptor in the electron transport chain that results to energy generation. Therefore the answer is Glucose.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

They can measure  the amount of energy gained or lost