Answer:
B) One scientist carries out the same experiment performed by another scientist to validate the results.
Explanation:
repetition definition is basically B. 
 
        
                    
             
        
        
        
Answer:
C
Explanation:
The load is the lightbulb just learnt this 1 week ago
 
        
                    
             
        
        
        
Answer:
false
Explanation:
in all living organisms, it consist of  systems that shows a  complemetary nature of structure and function at all organizational  levels . these levels are cells, organs, tissues, organ systems, whole organisms,  and ecosystems. every part plays a role in every function in the body.
 
        
             
        
        
        
It has a rough appearance because the surface is covered with ribosomes that produce protein. ..... I hope this helps :)