Answer:
B. osteoclasts 
Explanation:
Osteoclasts counters the functions of the osteoblasts. Osteoblasts help
In bone formation while the osteoclasts when activated triggers the production of digestive enzymes which dissolved the bones and reduces its density.
 
        
             
        
        
        
Answer:
Bacteria can have one flagellum or several.
 
        
             
        
        
        
Because we have smelled them so long we are used to them
        
             
        
        
        
It helps move wastes out of the cell and allows water and nutrients to move into the cell
        
                    
             
        
        
        
Answer:
dear user nitrogen fixation is so important bcoz of the reasons given above