Answer:
Change in the species structure of an ecological community over time. (A)
Explanation: Google 
 
        
                    
             
        
        
        
B it's a vegstigial trait
Many biology texts today still refer to the appendix as a vestigial organ
        
                    
             
        
        
        
Traits are inherited by genes on a chromosomes from the Mother and Father of the Offspring.They are passed down from our parents to us and there is 26 different chromosomes which determine what you look like.
        
                    
             
        
        
        
Answer:
Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes. However, unlike prokaryotic cells, eukaryotic cells have: a membrane-bound nucleus. numerous membrane-bound organelles
Explanation: