Reception, transduction and responde
        
             
        
        
        
Answer:
the answer is B. 2 long, 2 short.
Explanation:
 
        
             
        
        
        
Amino acids are known to be the building blocks of proteins. Amino acids are organic substances and organic substances contains carbon. Amino acids have an amine group and the carbonyl group (-OH) which contains nitrogen and oxygen respectively. Proteins can also be derived from other sources like meat. Proteins can perform different functions, being an antibody is one. 
        
                    
             
        
        
        
Answer:
Haemoglobin (Hb) is a protein present in red blood cells that transports oxygen and gives blood its dark/vivid red color. The amount of haemoglobin in the blood varies from person to person. Men's levels are often greater than women's. This is scientifically proven however, it is often but not all the time.