Large size of pinnae in animals of warm regions in comparison to animals of cold regions is due to:

Adaptation found in Kangaroo rat is

$A$ characteristic which enables an organism to live in an environment is called

Plains with snow,ice,and frozen soil for most of the year are found in

What is the unit formed by the interactions of populations of various species in a given area called?

In summer,when the outside temperature is higher than our body temperature,we sweat profusely. The resulting evaporative cooling,similar to what happens with a desert cooler in operation,brings down the body temperature. In winter,when the temperature is much lower than $37^{\circ}C$,we start to shiver,a kind of exercise which produces heat and raises the body temperature. These organisms are called: