Nucleus, The “brains” of the cell, the nucleus directs cell activities and contains genetic material called chromosomes made of DNA.
 
        
                    
             
        
        
        
Answer: 
Secondary succession is the series of community changes which take place on a previously colonized, but disturbed or damaged habitat. Examples include areas which have been cleared of existing vegetation (such as after tree-felling in a woodland) and destructive events such as fires.
 
        
             
        
        
        
<span>(of hearing loss) caused by a lesion or disease of the inner ear or the auditory nerve.</span>
        
             
        
        
        
Answer:
because they have nothing wrong wit them
Explanation:
 
        
                    
             
        
        
        
Answer:
Changes in the environment may leave individuals less well adapted to compete successfully for resources such as food, water and mates. Sometimes an entire species may become unable to compete successfully and reproduce. These problems can lead to extinction.