Answer: repel forces and attract forces
 
        
             
        
        
        
Answer: Nonpolar lipid layers
Explanation:
 
        
                    
             
        
        
        
The medulla oblongata is a primary respiratory control center. It’s main function is to send signals to the muscle that controls respiration to cause breathing to occur. There are two regions in the medulla that control respiration the ventral respiratory group stimulates expiratory movement.
        
             
        
        
        
The features which create deposition from rivers are found in food plains, alluvial fan, and deltas.
Deposition is termed as a process whereby the transported materials by a river are being deposited.
When a river losses energy we say that there is deposition.
Where there is high flow of water in a river deposition is likely to occur because more sediments are being carried as well as erosion which is being caused.
 
        
                    
             
        
        
        
The mouth of a large river, where the river meets the sea