3 phosphate groups, hence tri-phosphate
        
             
        
        
        
If the substances preform the same in a variety of test, the they are the same. This is because they should always be tested in multiple categorys to see if they are the same or at least alike. 
 
        
             
        
        
        
Answer: A. have lower atomic numbers than the elements in the rows near the bottom.
Explanation:()
 
        
             
        
        
        
Answer: They must be randomly chosen, meaning that each member of the larger population has an equal chance of being chosen. They must be large enough so as not to skew the results. The optimal size of the sample group depends on the precise degree of confidence required for making an inference. Simple random sampling is the basic sampling technique where we select a group of subjects (a sample) for study from a larger group (a population). Each individual is chosen entirely by chance and each member of the population has an equal chance of being included in the sample.
Hope this helps... Stay safe and have a great day/night!!! :D
 
        
             
        
        
        
Because different cells of the body need to reproduce faster like blood cells because if we didn't have them we would die, or when your growing your body is getting rid of old cells and replacing them