A polarizing camera has a great affect on photo quality. When using a polarizing camera, skies are often darkened, reflections are controlled, and glares are often brought down or suppressed. Hope this helped :)
 
        
             
        
        
        
I think it's D. It shields life forms on the surface from radiation?
 
        
             
        
        
        
True! because if you have more than one variable, you aren’t going to know which variable changed the dependent variable.
        
                    
             
        
        
        
The phrase to fit into the blank is "sexual reproduction"!
In sexual reproduction each of the parents produces a gamete and contributes to half of the  offspring's genes. This means that the offspring is a unique composition of the two parents. 
In contrast, in a asexual reproduction, the offspring would likely have the same genetic code as the parent.
<span />
        
                    
             
        
        
        
Mass can either increase or decrease the speed depending on the height of the roller coaster.