The most important differences between a transmission electron microscope and a scanning electron microscope are: Rather than the broad static beam used in TEM, the SEM beam is focused to a fine point and scans line by line over the sample surface in a rectangular raster pattern
question answered by
(jacemorris04)
 
        
             
        
        
        
Answer:
hydrogen gas dominated earth's first atmosphere? 
 
        
             
        
        
        
B is the right answer:
A more biodiverse ecosystem has a higher chance of adapting to species changes. 
 
        
             
        
        
        
<span>Mechanical waves....</span>
        
             
        
        
        
The correct answer would be D.
After many generations, only those with genes suitable to live in harsh environments can live. These genes are passed onto their offspring and then we see a rise in antibiotic resistant strains of bacteria such as Methicillin Resistant Staphylococcus Aureus (MRSA).