What are the major levels of organization, from smallest to largest, that ecologists commonly study? The 6 different levels of organization that ecologists commonly study are species, population, community, ecosystem, and biome.
 
        
             
        
        
        
C: Mountains. 
Explanation: The two plates collide and push up against each other, forming the mountains
        
             
        
        
        
Answer:
Ventlation or breathing, is the movement of air through the conducting passage between the atmosphere and the the lungs. The air moves through passeng because of pressure gradients that are produced by contraction of the diaphragm and thoracic muscles. 
 
        
                    
             
        
        
        
Answer:Ridge push 
Explanation: hope this helps <3
 
        
             
        
        
        
<span>DNA, cell membrane, ribosomes, and membrane-bound</span>