Protein is required for the growth and maintenance of tissues.
Enzymes are proteins that allow chemical reactions to take place within your body.
Amino acid chains of various lengths form protein and peptides which make up several of your body’s hormones and transmit information between your cells, tissues and organs.
A class is proteins known as fibrous proteins provide various parts of your body with structure, strength and elasticity. 
Proteins act as a buffer system, helping your body maintain proper pH values of the blood and other bodily fluids.
Proteins in your blood maintain the fluid balance between your blood and the surrounding tissues.
Proteins form antibodies to protect your body from foreign invaders, such as disease-causing bacteria and viruses.
Hope this helps :)
        
             
        
        
        
<span>The number of births equals the number of deaths
*brainliest answer if possible 
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Answer:
It will decrease in size and it will pinch to surround anything entering the cell.
 
        
             
        
        
        
Answer:
True
Explanation:
mtDNA is passed from mother to child.
 
        
                    
             
        
        
        
Theories are educated guests that are tested by experiments