There are <span>scientific (<span>Result: <span>505900</span> or 5.059e+5 (significant figures: 4, decimals: 0)) </span>figures</span> in the number 505900.
        
             
        
        
        
Correct answer: A). Root
The part of the word that can not be broken down is called root word. In the word claustrophobic ''phob'' is the root word. It can not be suffix as a suffix are added after the root word. It cannot be prefixed as it is added before the root word. Here the prefix would be ''claustro'' and suffix would be ''ic''. It cannot be affixed as it contains both suffix and prefix.
Hence, the correct answer would be option A.
 
        
                    
             
        
        
        
Answer:
Explanation:
a sugar, a phosphate group, and a nitrogenous base.
 
        
                    
             
        
        
        
<h2>Tropomyosin</h2>
Explanation:
This protein is most likely:  Tropomyosin.
Sacromere is the structural unit of myofibrils i.e. the fibres of the muscles. 
Tropomyosin is the muscle protein that function in contraction of muscle filaments.They are arranged laterally along the myofilament. When the researcher is observing the sacromere, she is observing the muscle fibre.  So, the protein that lines the periphery along the thin filament is more likely to be tropomysin.