It can help determine the components materials of a composite 
        
             
        
        
        
Specialized cell junctions<span> occur at points of cell-cell and cell-matrix contact in all tissues.</span>
        
                    
             
        
        
        
The organelle which labelled A is C. golgi apparatus
        
                    
             
        
        
        
Carbohydrates are naturally occurring sugars, starches and fiber in food. All carbohydrates are made up of sugar molecules. Sugar molecules linked together form starches and fiber. In the body, starches and sugars are broken down in the digestive system to glucose.
        
             
        
        
        
Prostist are eukaryotic, unicellular, and heterotrophic