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

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.

During adverse seasons,therophytes survive by:

Altitude sickness,which includes nausea,fatigue,and heart palpitations,occurs due to:

Relative to roots, the shoots are massive in plants of

Which of the following represents an organism and its ecological niche correctly?