Answer: It is an amino acid that cannot be made by the body. It must be obtained from eating certain foods.
Explanation:
 
        
                    
             
        
        
        
The correct answer is 'If molecules are small enough, then they can pass through the semipermeable membrane because they can cross the semipermeable membrane from their small pores or openings'.
The semipermeable membrane is permeable to few molecules, and the smaller molecules pass through the molecules from small pores present in the semipermeable membrane. The size of the big molecules are large, so, they cannot cross through semipermeable membrane. 
 
        
                    
             
        
        
        
Matrix are within the inner membrane of the mitochondria.
        
             
        
        
        
Cohesive. This means that the water is attracted to other particles of itself, so they stick and bead up.