The functional groups determine the shapes of macromolecules and this in turn determines their functions
        
             
        
        
        
Sedimentary because it is made of layers of sediment and fossils can easily get mixed in
        
                    
             
        
        
        
Hello there,
Your answer would be "Dissolved Oxygen"
Hope this helps
~HotTwizzlers
        
             
        
        
        
The bronchi (singular: bronchus) are the airways that lead from the trachea into the lungs, and then branch into smaller bronchioles. Structurally, the bronchi are made up of cartilage that gives them stability and prevents their collapse.