Alpine forests of the Himalayas have:

Given below are two statements:
Statement $I$: Stenohaline animals tolerate a wide range of salt concentration.
Statement $II$: Euryhaline animals are capable of handling a narrow range of salt concentration.
In the light of the above statements,choose the most appropriate answer from the options given below:

Mammals from colder climates generally have shorter ears and limbs to minimize heat loss. This is known as:

Definition / Explanation: Poikilotherms

Phenotypic variants formed in a population due to change in environment are called

$A$: Antarctic fishes have blubber to withstand sub-zero temperatures.
$R$: Blubber are proteins which allow the freezing of body fluids.