Answer:
The two main things happen during Prophase of Mitosis are given below. 
1) In prophase stage of mitosis, condensation of chromosomes occurs which is necessary for the formation of daughter cells. 
2) Breakdown of nuclei occurs and moves to the opposite poles. 
If this phase is not take place during mitosis, the cell will not divide into daughter cells
 
        
             
        
        
        
Dissecting microscopes used for the observation of larger objects and u can get a magnification of less than 100x. 
<span>Dissecting microscopes are most often used by plant biologists
IM NOT VERY SURE</span>
        
             
        
        
        
Answer:
this is question can you ask is this question
 
        
             
        
        
        
Pretty sure the answer is oxygen, as it is produced in photosynthesis and consumed in respiration.