The heart has 4 chambers.
        
                    
             
        
        
        
Conservation and by recyclig we can improve biodiversity
        
                    
             
        
        
        
The Endoplasmic reticulum is a series of pipes and it moves in the cell. Without the E.R., the protein factory (ribosomes) would not be able to ship the proteins and cells would starve to death. Hope this helped!
        
                    
             
        
        
        
Answer:
the dogs secure there offspring by getting them food
Explanation: