Biological difference between females and males.
        
             
        
        
        
Answer:
none is needed
Explanation:
scientists taking resources from the ocean does not affect the overall health of the ocean 
 
        
             
        
        
        
The most widely used renewable energy source is hydropower.  While this has many benefits, it also causes many environmental concerns when the dams get built.
        
                    
             
        
        
        
Answer:
They are able to move water through their bodies through the coordinated beating of flagellated cells that line their pores.
Explanation: