The organisms should try to maintain the constancy of its internal environment is a process called .......

Ecological hierarchy comprises which of the following sequences?

Alpine tundra is found in

Consider the following four conditions $(1-4)$ and select a correct pair of them as adaptations to the environment in desert lizards.
Conditions:
$1$. Burrowing in soil to escape high temperature.
$2$. Losing heat rapidly from the body during high temperature.
$3$. Bask in sun when temperature is low.
$4$. Insulating body due to thick fatty dermis.

Smaller animals tend to lose body heat very fast as compared to larger animals because they have

What is formed by the populations of different species living together in a common habitat?