Ranking on hormonal levels presents on mutant ob, db and normal rats parabiosed to either. 
 
(db rat +ob rat) ( db rat + normal rat) (ob rat + norma rat  )(normal rat + normal rat )
Rats are ranked according to leptin levels. Leptin levels are directly proportional to the production of adipose fats present.
        
             
        
        
        
Answer:
a pond of water drying out due to changes in average temperature
 
        
             
        
        
        
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The best term that would describe the Black Panther is a predator