The biosphere is composed of ......

Select the correct statement with respect to adaptations.

Which one of the following pairs is correctly matched?

Consider the following four statements $(1-4)$ and select the correct pair of adaptations shown by desert lizards to manage their body temperature in their environment.
$(1)$ Burrowing into the soil to escape high temperatures.
$(2)$ Losing energy rapidly from the body during high temperatures.
$(3)$ Basking in the sun when the temperature is low.
$(4)$ Covering the body with a thick,fatty skin.

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

The treeless biome of cold climates is: