The main reason for the difference in the mass extinction occurring today and previously is the pace of the current extinction. The extinction is taking place globally and involves hundreds of species at the same time. In less than 50 years, we have lost numerous species. In contrast to this, previously during the mass extinction, only a few species were lost, and other managed to survive. But, not the status is opposite due to the magnitude of the extinction. 
        
                    
             
        
        
        
The correct answer is: 'the ability to transform chemical energy into mechanical energy'. The oxidation of fats and carbohydrates through chemical reactions produce adenosine triphosphate (ATP) molecules. These ATP molecules power m<span>uscles, thereby converting chemical energy to mechanical energy.</span>
        
             
        
        
        
Answer:
The species is not prey to what is already living there and as a result may reproduce uncontrollably and end up causing the other species to go extinct by stealing the resources they need.
Explanation:
 
        
             
        
        
        
Eukaryotic cell
A Eukaryotic cell contains a nucleus; more than one chromosome and is typically a multi-celled organism.  Both plant and animal cells are eukaryotic cells.
<span>The advantage is that eukaryotic cells have a nucleus which functions formally as to store the DNA of the cell which can translate into many functions such as cell division and work structure between cells that forms the hierarchial function to tissues.<span> 
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