Answer: We need DNA to reproduce and it's unique due in part to recombination. recombination is traded between the chromosomes that make up a pair.
Explanation:
 
        
             
        
        
        
Answer:
The filter is the independent variable--the one that is intentionally varied.  The click rate depends upon the filter selected
hope this helps :)
 
        
             
        
        
        
Answer:
Biology is the study of life. The word bio means life, ology means the study of.
Explanation:
I'm not sure if this is what you were looking for but this is the definition
 
        
                    
             
        
        
        
Answer:
Due to convergent evolution/ analogy
Explanation:
Analogy in evolution is the development of similar or analogous structures in distantly related species occupying the same environment. This is because the species have developed similar adaptations, over time, that enables them to survive in their environment. 
 
        
                    
             
        
        
        
There are  around 640<span> to </span>850 muscles in human body and they can be categorized in three main groups: <span>skeletal, visceral, and cardiac. </span><span>
The muscles that extend the forearm are located </span>posteriorly. These are the muscles located on the back.