Temperature regulation is found in

The moving away of an organism temporarily from the stressful habitat to a more hospitable area and return when stressful period is over is called . . . . . . .

In autumn, the change in leaf color is observed only in:

Invertebrates living in the deep sea, at extreme depths, experience pressure how many times greater than the normal atmospheric pressure (in $\times$)?

Eurythermal organisms are those which

The genus $Quercus$ is a dominant component in: