Which biome is associated with the Arctic desert?

Which of the following are examples of short-term adaptation?
$(1)$ Accumulation of melanin in the skin
$(2)$ Utilization of stored fat by animals during hibernation
$(3)$ Seed dormancy
$(4)$ Phototropism of stems and geotropism of roots

What is the most important factor for the success of an animal population?

Which of the following hierarchies is correct with reference to the levels of biological organization?

Animals which live at the bottom of the sea are known as:

Behavioural adaptations to the environment in desert lizards are:
$I.$ Burrowing into the soil
$II.$ Losing heat during high temperature
$III.$ Active during morning and evening
$IV.$ Insulating body due to thick fatty dermis
Select the correct pair.