Evaluate the evolutionary benefits of regulating an internal variable, such as body temperature, versus the cost.

The benefits of being able to regulate the internal body temperature are many and it is considered a beneficial evolutionary character, since in this way the living organism is better maintained in relation to the environment, and it achieves better balance.

Reptiles cannot control their internal temperature, it depends on the external one, that is why to warm their body they need to be in the sun, and to cool down in the shade or in temperate places.

This is a little evolutionary characteristic since the environment is very changeable and the right or ideal temperature for the organism could not be controlled.

Explanation:

Faced with climatic catastrophes or extreme situations, living organisms cannot depend on the great climatic variants, in very cold situations one enters hypothermia and in very hot conditions the proteins are systematically denatured, entering a thermal shock.