Answer: a lot or. There is over 5 sapiebs 
Explanation: They are still looking for then
 
        
             
        
        
        
Scientists establish the age of a rock or fossil based on natural radioactive decay and certain elements such as potassium and carbon, this is used to make reliable “clocks” to date ancient events. 
(Sorry if not all is accurate hope it helps)
        
             
        
        
        
B) Flu is easily transmitted from person to person.
If there is a very big population density, it means more people are present in a small amount of space. Thus they will come into contact more often and the virus is likelier to spread more rapidly.
        
             
        
        
        
It is found in the cytoplasm as a simple circle.