Carbohydrates,proteins,lipids,Nucleic acids
        
             
        
        
        
Answer:
hand lens is used to make small object to appear larger hence visibility is easily attained
 
        
             
        
        
        
Answer:
The pressure of a gas increases in a closed container if the volume of the gas decreases. Pressure and volume have inverse relationship which means if one increases the other decreases and vice versa. If pressure increases, volume of a gas decreases because there are a lot of empty spaces present between gas particles which are filled when gas particles come closer to each other due to pressure applied.
 
        
             
        
        
        
More often. please correct me if I am wrong
        
             
        
        
        
Answer:
The second one. 
Explanation:
Purpose, hypothesis, procedure, data, analysis, and conclusion.