Invloves pysiological adjustment to the environmental conditions in the individuals.
Protruding body parts such as limbs are relatively shorter in cooler ares of species range than in warmer areas like Inuit (Eskimos)
General relationbetween body size and temperature: the selender and taller populations of the species inhabit the warmer parts of its geographic range.
Skin colors: mammals living in the warmer climates have more melanin to protect them from UV ray and, darker skin, or fur.
A condition of oxygen deficiency that often occurs at high altitudes. The percentage of the oxygen in the air is the same as at lower altitudes, but because the barometic pressure is lower, less oxygen is taken in with each breath. Often breathing become more rapid, the heart beats fater, and activity is more diffcult.
Sickle Cell Anemia
A condition in where red blood cells assume sickle shape when deprived of oxygen, instead of the normal disk shape. The sickle cell chape don't move well, and thus damage to heart, lugs, brain, and other vital organs.
Gentics changes that give their carriers a better chance to survive and reproduce than the individuals without the genetic change who live in the same environment.