I think it's C. Because hibernation is usually for animals living in Continental climates. I basically just eliminated the other answers until I got that one. One example for animals living in cold climates burrowing are Arctic Foxes.
        
             
        
        
        
Answer:
Exterior of the cell
Explanation:
Pancreas is a gland found behind the stomach and it secretes digestive enzymes into the duodenum.
Digestive enzymes are proteins hence leucine will form part of the enzymes.
Digestion of food takes approximately three hours. Therefore, if labelled Leucine  is chased down with non radioactive leucine. 
Black spots will appear on the exterior of the cells because digestive enzymes are extracellular enzymes .
 
        
             
        
        
        
Answer:
The climate of Antarctica was probably much warmer in the past than it is today.
Explanation:
There are little things living there now. Coal takes millions of years to form. There must have been much more living things there in the past (when it was warmer) to make coal.
 
        
             
        
        
        
Answer:
Paul uses Irradiation. The technique uses gamma rays
Explanation:
 
        
             
        
        
        
They are found in bacteria and eukaryotes is false