D oxygen there was no free oxygen on the earth
        
             
        
        
        
Answer: frameshift mutation
Explanation: A frameshift mutation is a particular type of mutation that involves either insertion or deletion of extra bases of DNA. Now, what's important here is the number three. The number of bases that are either added or subtracted can't be divisible by three.
 
        
             
        
        
        
 This is what I found on the internet: Ethanol The alcohol which is produced<span> as a result of fermentation of sugars by </span>yeast<span>. fermentation A term for respiration in the absence of oxygen. </span>glucose<span> A simple sugar made by the body from food, which is used by </span>cells<span> to make energy in respiration. lactic acid A toxic chemical </span>produced<span> during anaerobic respiration.</span>
        
                    
             
        
        
        
Answer: 
F should be the correct answer because that one say bones have bone marrow which is true and they make white blood cells