Answer:
C. Organisms are grouped by species
Explanation:
In Ecology, organisms are grouped by species.
 
        
                    
             
        
        
        
Technically, they can but you don't have to be related because you can have things in common with another person with are personality traits , and if they have different skin colors it doesn't matter , and you can still have many traits in common , because my sister is darker than me a lot but we still share same traits.
        
                    
             
        
        
        
Answer:
Speeding up chemical reactions by lowering the activation energy. 
Explanation:
 
        
                    
             
        
        
        
Explanation:
For example , black people may be arrested more frequently in part because they experience greater poverty.