While Louis Pasteur was the one that procured the germ theory of disease that explains that diseases are caused by microorganisms, the first researcher that provided direct experimental data to support the said theory is Robert Koch. 
Robert Koch developed a criteria for the causality of disease from microorganisms called the Koch's postulates. The Koch's postulates indicate that:
(1) The bacteria must be present in every case of the disease
(2) <span>The bacteria must be extracted and isolated from the host with the disease and should be directly visualized and/or grown in culture
(3) There must be a healthy experimental host that will reproduce the disease once the isolated bacteria is injected
(4) The bacteria should be recoverable from the previously healthy host
</span>
        
             
        
        
        
Answer:
some traits become more common, others less. ... The traits that become more common are the ones that are “adaptive” or “increase fitness” (that is, a creature's chances of living longer and producing more offspring).
 
        
             
        
        
        
Not necessarily because cells them self don't actually contain cells
        
                    
             
        
        
        
Answer:
Because you could be wrong.
Explanation:
 if you mess up one thing it can mess up the entire project or experiment.
 
        
             
        
        
        
Just take that photo and go to google home then google lens and press library and put the photo in and it will find something similar.