In the chemical process of photosynthesis water is a chemical change 
I hope that's help ! 
 
        
                    
             
        
        
        
The answer is c. they live in conditions similar to those likely to be found on other planets.
        
                    
             
        
        
        
The answer is Cell Membranes.
        
                    
             
        
        
        
Circulatory system. This includes blood.