Answer:
mitosis
Explanation:
mitosis occurs after DNA in the nucleus has doubled
 
        
                    
             
        
        
        
it can show us our history and may help us discover relatives we never new we had or lot contact with.
 
        
             
        
        
        
D: interphase 
during this phase , the chromosomes undergoes duplication of chromosome of 1 chromatid into chromosome of 2 chromatids , then the cell is ready for the cellular division.
        
                    
             
        
        
        
Answer:
D. increasing the number of mitochondria
Explanation:
The mitochondria are membrane-bound cellular organelles found in the cell of an eukaryote. Mitochondrion is responsible for the production of energy since the process which releases the energy (cellular respiration) occurs in it. 
In an experimental procedure whereby the amount of energy which is produced by a cell is about to be increased will involve the increase of the number of mitochondria in that cell. Since more mitochondria means more energy production. 
 
        
             
        
        
        
With less energy at higher trophic levels, there are usually fewer organisms as well. Organisms tend to be larger in size at higher trophic levels, but their smaller numbers result in less biomass
Population size is the number of individuals in a population. Population density is the average number of individuals per unit of area or volume.