Answer:
Carbon.
Explanation:  It is the only element that makes up every living thing.
 
        
                    
             
        
        
        
Answer:
See below
Explanation:
It is important to be both reliable and precise when taking scientific measurements. Precision indicates how similar a metric is to its true meaning. This is necessary because incorrect hardware, bad data analysis or human error will yield inaccurate and false performance.
<em><u>Hope this helps.</u></em>
 
        
                    
             
        
        
        
Protozoan infections are parasitic diseases caused by organisms formerly classified in the Kingdom Protozoa. They include organisms classified in Amoebozoa, Excavata, and Chromalveolata. Examples include Entamoeba histolytica, Plasmodium (some of which cause malaria), and Giardia lamblia.
 
        
             
        
        
        
Melanophores are small pigments that are present in the dermis layer of the skin of a shark. They impart a gray color to the dorsal and lateral surface area of the shark. They help in background adaptation and countershading of the body, which makes a shark difficult to be seen.