Endosymbiosis 
that is my explanation hopefully its right
        
             
        
        
        
Answer:
That's correct most birds have diffrent shaped beaks for diffrent reasons for example some birds can tweezer beaks which helps to dig into the worm holes to get worms or help to drill into trees
Explanation:
 
        
             
        
        
        
<span><span>A plant that, when self-fertilized, only produces offspring with the same traits.</span></span>
        
             
        
        
        
Answer:
Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object. The dark area is called a shadow
 
        
                    
             
        
        
        
You are exercising, doing aerobics or a stair climber at your fitness center. as you increase to a high intensity of exercise, you would expect the tidal volume to increase and the frequency of respiration to increase.