the answer is B cholesterol, which is a direct product of the steroid nucleus. 
 
        
             
        
        
        
Chromosome appear in the prophase.
        
             
        
        
        
Answer:
D. The life cycle of a high-mass star
Explanation:
 
        
             
        
        
        
The answer is C. Cenozoic era. 
It's the era when mammals evolved into larger organisms and began subdividing into various species. Cenozoic is also known as the age of mammals, because it's the mammals that mostly occupied the lands.
        
             
        
        
        
Answer:
amylase break down carbohydrates....