Answer:
Cytokinesis
Explanation:
Cytokinesis is similar to telophase. The cell devides it cytoplasm into two pieces which creates two daughter cells. 
 
        
                    
             
        
        
        
In the given case, Adeline is probably to get scared and shocked regarding menarche as the culture of her time did not assist in educating young women about menarche.  
Menarche refers to the initiation of the menstrual cycle, or first menstrual bleeding, in females. From both the medical and social point of view, it is usually regarded as the principal incident of female puberty, as it indicates the probability of fertility.  
 
        
             
        
        
        
It’s an organ that is part of the circulatory system
        
             
        
        
        
For plants, it's photosynthesis.