When a doctor observes the symptom of a patient and tells
that he or she is likely having a flu, the reasoning she or he used is likely
from the effect to cause. The reasoning from effect to cause is having to check
on the cause in order to produce or come out with the effect in which the
symptoms is the cause of the flu, in which the flu is the effect.
 
        
             
        
        
        
Answer:
Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object. The dark area is called a shadow
 
        
                    
             
        
        
        
Answer:
Explanation:
can be observed and measured without changing composition (just say comp.), are used to observe and describe
 
        
                    
             
        
        
        
Answer:
The correct answer is it causes immediate pathogen lysis.
Explanation:
The  complement system is a part of innate immune system which is called first line of defense mechanism of our body.
          complement system along with various proteins and enzymes stimulate the phagocytic cells to attack the plasma membrane of foreign pathogen,Which ultimately result in the lysis of foreign pathogen by phagocytosis mechanism.