Answer:
SURGERY.
Explanation:
Based on classification by the United States department of Agriculture, Category C, animals are exempted from procedure that can inflict pain, or distress.in addition any procedure that involved the use of analgesics (e.g. surgery) should not be performed on the animals.
Besides, regular procedures, of administration of injections and taken blood samples(preparation for surgery) which may produce minimal discomfort are also classified in this category.
 
        
             
        
        
        
<span>The mirror is used to focus light  through the opening in the  in the  stage of the microscope.</span>
        
             
        
        
        
Answer:
A quadrat is a frame (usually a square or a circle) of known area used to isolate a subset of the population. This subset will comprise one sample. Quadrats come in various sizes (and shapes) with the size selected determined by features of the organisms in the population to be sampled.
Explanation:
hope this helps
 
        
             
        
        
        
They knew traits were inherited, but they did not know why.
 
        
                    
             
        
        
        
B connective; bind and support the body