Answer:
oxygen is an element and water is a compound 
Explanation:
oxygen is made up of two atoms and water is made up of two elements
 
        
             
        
        
        
Answer; 
-Chitin is a structural carbohydrate that forms their exoskeleton
Explanation; 
-Chitin is the main component in the exoskeletons of arthropods and crustaceans and is also in the cell walls of fungi.
-It is a linear long chain polymer consisting of repeated units of N-acetyl-glucosamine. 
-The main function of the chitin-containing exoskeleton is to keep the inner soft tissue safe from any sort of injury and also prevents the delicate tissues from drying (acts as a water tight barrier against dehydration).
 
        
                    
             
        
        
        
Increasing its pH because then the enzyme wont be ablr to work properly
        
                    
             
        
        
        
Answer:
B) a higher protein to lipid ratio.
Explanation:
The cell membrane of eukaryotes is known to be a phospholipid bilayer with embedded proteins.  This implies that the first tube will contain a higher amount of lipids.
The membrane of the mitochondria is slightly different from the cell membrane in which its protein to lipid ratio is higher, containing a large number of integral proteins.