I know this is a little late but i thought i should still tell you that its the endocrine organ
        
             
        
        
        
The Truck will take more force to stop the truck  moving at a speed of 55mph weighing 4000kg has alot more momentum and will require a force equal to its speed and mass to stop it therefore the truck is the most obvious answer hope this helped bud
        
                    
             
        
        
        
The answer is false. Hope this helps
        
                    
             
        
        
        
Answer: 2. Each subunit represents a separate polypeptide chain, while one polypeptide chain may contain several domains.
Explanation: Each subunit constitutes of one polypeptide chain. A polypeptide chain has one particular gene coding for it. thus it simply implies that a protein must have one gene for each subunit.
Many proteins is made up of different protein domains. A particular domain may appear in a variety of different proteins.
 domains are stable on there own, they can be exchanged via genetic engineering between one protein and another.