Answer:
It is circulatory system and the digestive system.
Explanation:
 
        
             
        
        
        
Answer:
ase 
Explanation:
Except for some of the originally studied enzymes such as pepsin, rennin, and trypsin, most enzyme names end in "ase"
 
        
                    
             
        
        
        
The best answer here is they show seasonal difference in flowering. if they self pollinated they could still interbreed assuming they flower in the same seasons