The drawing above is acting as a B) a screw.
        
             
        
        
        
Answer:
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Explanation:
The nucleus in biology is usually referring to that of 
living cells found in organisms in which contains DNA whereas the nucleus in chemistry is usually referring to that of atoms in which contains subatomic particles such as the proton and neutron. 
 
        
             
        
        
        
Answer:
A system of knowledge and the methods to find that knowledge is Science. 
 
        
             
        
        
        
Answer:
Aluminum, boron, and gallium are likely together in one group because they have the same number of valence electrons, and carbon and germanium are likely together in another group because they have the same number of valence electrons.
Explanation:
 
        
                    
             
        
        
        
Answer:
bottom right top left fig