Four unifying principles form the foundation of modern biology<span>: cell theory, evolutionary theory, the gene theory and the </span>principle<span> of homeostasis. These </span>four principles<span> are the founding principles of each category of biology</span>
        
             
        
        
        
I'm not exactly sure what specifically you are asking for in relationship to balancing equations, but I have some examples with working out so you can examine them and try to go through the steps with them.
Hope this helps! <3
 
        
        
        
She would find oxygen (O2) in the test tube because plants give off oxygen
        
             
        
        
        
The answer is A because it talks abt the environment and stuff
        
             
        
        
        
Answer:
A: Large fins
Explanation:
Large fins help it propell through the ocean fast.