<span>The genetic term used to describe an observable trait is phenotype. More specifically phenotype is the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.</span>
        
             
        
        
        
<u>Radiometric</u> dating uses a radioactive substance to determine the <u>absolute </u>age of something.
 
        
             
        
        
        
A very acidic pH level is 1, and a very basic pH level is 13. 
        
                    
             
        
        
        
It is true, it does release hydrogen ions in a water base.
        
                    
             
        
        
        
A chase of cheetahs and lions and how they hunt the same prey and have to compete to get it first.