You need amino acids in your diet every day, since your body doesn't store excess amino acids consumed.  If essential amino acids are missing from your diet, your body will start breaking down muscle tissue to access the amino acids that is contains so they can use them elsewhere.
 
        
             
        
        
        
Option C 100mv because the membrane goes from -70 mV to +30 mV. Thus, during the action potential, the inside of the cell becomes more positive than the outside of the cell.
        
             
        
        
        
hey mate ur question I incomplete make sure ur question is complete
 
        
             
        
        
        
Answer: Option A 
Explanation:
Birds attach the bur of the plant which helps in the pollination. The birds sit on the plant and the burs of the plant gets attached in the legs of the birds which is transferred from one place to another.
Seeds at a different place will help in reproduction and growth of the plants. In this case the birds are carrier of the burs.
This is how the birds help in the reproduction of the plants by becoming the messenger.