A is the correct answer i know this one i had this question before
        
             
        
        
        
There are so many species in the millions of years discovering each one. Classifying is one way that organizes all types of species into categories, knowing what they are, their characteristics, their habitat, etc
        
             
        
        
        
Do you have the sentence where the author uses the word?
        
             
        
        
        
I believe the nuclear membrane