All plant cells have different things too do, the bigger the job basically its gonna be larger than the ones that's not doing as much. Hope that helps, you.
D because fresh water can always replenish but coal takes millions of years to form
Answer:
As Jane exercises her heart rate and breathing rate increase because he muscles are asking for more oxygen and get rid of more carbon dioxide. More blood is diverted towards the muscles as they need more oxygen for respiration. She needs to burn glucose with oxygen and water to produce energy so she can run. The way she can get this oxygen into her body is through her lungs. Where oxygen from the air diffuses into the blood and carbon dioxide diffuses out.
