Answer:
movement to and fro or around something, especially that of fluid in a closed system.
 
        
                    
             
        
        
        
b. the first stage because it could never be in the secound stage
 
        
                    
             
        
        
        
A complex chemistry is most related to maintaining a stable internal environment.
        
             
        
        
        
Answer:
Plate motions cause mountains to rise where plates push together, or converge, and continents to fracture and oceans to form where plates pull apart, or diverge. The continents are embedded in the plates and drift passively with them, which over millions of years results in significant changes in Earth's geography.
Explanation:
Hope it helps 
 
        
             
        
        
        
Answer; 
Ribosomes; 
Explanation; 
Ribosomes are organelles that are found inside a cell attached to the rough endoplasmic reticulum or freely suspended in the cytoplasm.
The are responsible for the process of translation which synthesis proteins in the cell. 
Therefore; a pesticide that kills an insect by interfering with
the production of proteins in the insect would
most directly affect the activity of ribosomes.