Answer:
Indpendant veriable cigarette smoking on lung cancer.
Dependant veriable:The number increase
Explanation:
 
        
             
        
        
        
Answer: Option B) The length of time over which the conditions are measured 
Explanation:
Weather is the atmospheric condition of a given area over a short period of time, usually days to several months
Climate, on the other hand, is the atmospheric condition of a given area over a long period of time, usually over 2 years.
Thus, weather and climate differ based on the length of time over which the conditions are measured.
 
        
                    
             
        
        
        
Answer:
DNA was discovered in 1869 by Swiss researcher Friedrich Miescher, who was originally trying to study the composition of lymphoid cells (white blood cells). Instead, he isolated a new molecule he called nuclein (DNA with associated proteins) from a cell nucleus.
Explanation: