Males of average height have about 4 grams of iron in their body, females about 3.5 grams; children will usually have 3 grams or less. These 3-4 grams are distributed throughout the body in hemoglobin, tissues, muscles, bone marrow, blood proteins, enzymes, ferritin, hemosiderin, and transport in plasma.
        
             
        
        
        
Answer:
Reduce the number of trips you take in your car. Reduce or eliminate fireplace and wood stove use. Avoid burning leaves, trash, and other materials. Avoid using gas-powered lawn and garden equipment.
 
        
             
        
        
        
In my opinion, chloroplasts and mitochondria can't live outside the cell now because mitochondria ensure the energy for the cell and the chloroplasts is important for photosynthesis. Just my opinion.
        
             
        
        
        
If those are the only answers i would say mutualism
 
        
                    
             
        
        
        
Answer: When you study environmental science, you commit to learning of  accomplish important tasks for our Earth and our human population.
Explanation: Hope this helps! :)