The role played by the systems of the body in ensuring survival of farm animals in hot and dry climates

Farm animals have a natural tendency to find shade and take shelter under it from the hot sun. However, their bodies have certain natural protective mechanisms also, to get relief from heat and dryness. One is their coat or fur, which provides protection from the sun

Limitation of comparative is that when it is done on a huge population, huge amount cost is required.

Benefit of comparative is that we can get descrete information about specific breed or species.