Answer:
Mixtures occur when two or more materials are combined and each material keeps its own properties. All of the following are  mixtures EXCEPT
Chocolate milk
Explanation:
Chocolate is a mixture but it does not keep its original properties
 
        
                    
             
        
        
        
Answer:
Option "C" is correct.
Explanation:
The reason is that, form the two experiments it was concluded that both O1 and O2 were recessive, so all these remaining options which says that any or both of them are dominant are incorrect.
 
        
             
        
        
        
Answer: c. The Earth’s surface is responsible for a small fraction of heat radiation to space.
Explanation:
In later ages the large amount of sun's energy is reflected back by the terrestrial surface back to the space. But now due to the abundance of large concentration of greenhouse gases in the atmosphere is responsible for the absorption of thermal energy from sunlight by these gases causing the atmosphere to be hot. This is the reason of global warming. Now only small fraction of heat is radiated back to the space.        
 
        
             
        
        
        
C) the changes reflect...
        
                    
             
        
        
        
●First Burn:skin becomes red and sensitive 
●Second Burn:skin will be red,blistered,swollen,possibly white patches 
●Third Burn:white or charred, dead skin becomes tough and leathery