Answer:
The specimen are placed in vacuum while examining the cells or living organisms. Also, the electron must penetrate inside of the cell and in such conditions, any living organism is not able to survive. Thus, this reason best explains the answer to why dead cells specimen must be used for Transmission electron microscopy.
Explanation:
 
        
             
        
        
        
<span>Leptin. Leptin is produced by fat cells and released when your body has enough fat in storage. When leptin reaches the brain, it gives your body a feeling of fullness so that you will not want to continue eating.
Individuals with leptin resistance, where the leptin hormone signals are not received as they should be, are often overweight because they do not have the same brain signals telling them that their body is full.</span>
        
             
        
        
        
What do you mean by responsible? Do you want to know the genetics behind it, what the surface markers do, or why they are metically important? I think I can help.
        
             
        
        
        
Phosphate 
Because it is the group of the molecules