The fluid inside a cell is cytoplasm
        
                    
             
        
        
        
If the cell were a factory, the lysosomes would function as the maintenance crew. The lysosome breaks down the enzymes and keeps the cell from working. The  factory can not operate without the maintenance crew. The maintenance crews make sure that the factory is well conditioned to work.
        
             
        
        
        
Answer:
The reason the compressed air gets cold after being used is due to a process known as adiabatic cooling, a property of thermodynamics. A gas, initially at high pressure, cools significantly when that pressure is released. The compression needed to turn a gas to liquid allows a large amount of gas to fit in a relatively small space, and when that gas is released to a large space, it rapidly expands to fill the space.
 
        
             
        
        
        
A person can only show a recessive trait if both of their parents carried at least one copy of each of the recessive allele. The parents do not need to show the trait, as one copy is not enough to reveal it, but they must both carry it.
Hope this helped!