Answer:
they were discovered by Robert Hooked in 1665. It looked like similar to cellua.
 
        
                    
             
        
        
        
Two wet glass slides stick together because the adhesive force acting between the glass and water is responsible for sticking up of the slides , the water trapped between the slides has a lower pressure as compared to the atmospheric pressures
        
             
        
        
        
Showing the strength of the bones  and the muscles and bones around it. 
 
        
             
        
        
        
Answer:
B
Explanation:
Oil from gas and cars does not contribute much to run off pollution. It mostly pollutes the air as it is used.