Answer:
find the right answer
Explanation:
if the control group is nit included in the experiment it would be hard to get the right solution(answer).
I think hopefully this helps.
 
        
             
        
        
        
Answer: Local chemical conditions
Explanation: A Precapillary Sphincter is a smooth muscle that is located in circles around the capillaries. 
The precapillary sphincter helps to coordinate blood flow to the into the capillaries by causing the capillaries to decrease the flow of blood to tissues that are dormant or not active. 
 
        
             
        
        
        
Science is based on the feature of "<span>detailed research with reliable sources" among many other things. It is crucial that the tests can be repeated with the same results. </span>
        
                    
             
        
        
        
Conventional genetic analyses of rRNA  sequence is not possible for prions because they don't contain nucleic acid.Prions do not contain genetic material such as - DNA and RNA.
The unique traits and genetic material information are encoded with the conformation structure and modification of protein.Prions which are responsible for transmissible sponginess encephalitis  is mammals which all known prion disease affect the neural tissues.
There are 253 amino acids exist in multiple conformations and isoform which is found in healthy organisms, most extensively studied proteins. Prions are not destroy easily and remains intact in the presence of radiation , disinfectant and extreme heat.
To learn more radiation here
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