For aerobic cellular respiration to take place, cells need oxygen. what is the source for this oxygen? the breakdown of glucose the air the breakdown of carbon dioxide the water

The correct answer is the air. As you inhale, air is pulled into your lungs. Your lungs "process" it and use the oxygen to oxygenate your red blood cells, which then circulate throughout your body, spreading oxygen to all of your cells.

there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

sorry if this did not , have a great day!