The nervous sysyem because i looked it up on the internet. search gal stones effect which body system then but a dash .You will find that it says  nervous system.
        
             
        
        
        
crop rotation mitigates the buildup of pathogens and pests that often occurs when one species is continuously cropped, and can also improve soil structure and fertility by increasing biomass from varied root structures. Crop cycle is used in both conventional and organic farming systems.
        
                    
             
        
        
        
The truth about intercellular signals are nucleus which opens up on an ion-linked channel.
Intercellular signals mediates and ionizes radiation which is being induced by stander effects.
Inorder to get to know more about intercellular signal we have to identify the transducers, receptors and the ligands.
 
        
                    
             
        
        
        
To produce hormones and also to produce electrical impulses
        
                    
             
        
        
        
Answer:
Both hold bodies of water above and underground.
Explanation: