A negative tropism is when a plant grows away from stimulus
        
             
        
        
        
Answer:
one cell
Explanation:
Oogenesis takes place in the outermost layers of the ovaries, ultimately resulting in the production of one cell.
 
        
                    
             
        
        
        
Precipitation, soil, temperature, humidity, and altitude 
        
                    
             
        
        
        
You're right. The Upper Mantle is directly under the Crust. Hope this helped! =^-^=