Well, I can give you some examples to research! 
The polar bear, the North Pole, Canada, and in general cold climates.
Climates; tundras (or toendra’s) 
The polars, see the polar bear
And the rainforest, so around the equator.
        
             
        
        
        
Diffusion across the alveoli
        
             
        
        
        
Dominance is not inherent to either an allele or its phenotype. It is a relationship between two alleles of a gene and their associated phenotypes; one allele can be dominant over a second allele, recessive to a third allele, and codominant to a fourth.