Answer:
The Urinary bladder, the ureter, and the urethra are all organs that belong in the execratory system. 
The heart and spinal chord are not organs in the execratory system. The spinal chord belongs to the nervous system and the heart belongs to the circulatory. 
 
        
             
        
        
        
It is in your text book .
Check in your text book
        
             
        
        
        
 A. There are double bonds present in the fatty acid chains of a polyunsaturated fat but none in a saturated fat.
That is the right answer >_> 
 
        
                    
             
        
        
        
Answer:
I think the answer is D
Explanation:
organisms can migrate to other areas and become an invasive species which can cause global problems. other things such as air pollution, water pollution, fires ect dont just remain in one area and all contribute to global warming which is a global issue.