Sugar is sucrose and a carbohydrate. It's made up of 3 elements. 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of oxygen. (C^12H^22O^11)
        
                    
             
        
        
        
Answer:
Mitochondria, endoplasmic reticulum, golgi apparatus, or chloroplasts would all be an example.
Explanation:
Unlike prokaryotic cells, eukaryotic cells have a nucleus enclosed in a plasma membrane, as well as the mitochondrias, endoplasmic reticulums, golgi bodies or apparatuses, and chloroplasts. 
 
        
                    
             
        
        
        
B) Oxygen may not have been able to accumulate in the atmosphere
        
             
        
        
        
Answer: close ended 
Explanation:
In a job oriented interview both open and closed ended questions are asked to the job seeker. The open ended interview questions are generally very long answer type questions these questions allows the person to express. These questions are asked to learn about the personality and interests of the job seeker. The closed ended questions are the short questions and they are easy to answer and these can be answered in yes and no. These questions are asked and answered quickly. The chances of mistakes in these questions are more. The chances of misinterpretation of the question is always more in these questions. But these questions allow to get more information about the candidate as compared to the open ended questions as during the open ended question session the job seeker can manipulate the facts but in the case of close ended questions the asking tendency is rapid so no manipulation can occur. 
 
        
                    
             
        
        
        
D. The discoveries confirmed many but not all of the classifications that were based on observable traits, and scientists revised classifications when necessary.