The principal components of the plasma membrane are lipids (phospholipid and cholesterol) , proteins , and carbohydrates groups that are attached to some of The lipids are proteins. 
RNA
        
             
        
        
        
Answer:
Is the variation in the ecosystems found in a region or the variation in ecosystems over the whole planet.
Explanation:
 
        
                    
             
        
        
        
Answer:
A.
Explanation:
DNA is replicated through reproduction to the offspring. Hope this helps :)
 
        
             
        
        
        
I say A not sure tho but I did get a grade 5 in biology