Animals living in colder regions have shorter tails and ears compared to animals living in warmer regions. This phenomenon is called:

Which organism does not drink water but uses water produced as a byproduct of its internal metabolic processes?

Which of these is/are considered the major biomes of the world?

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

$A$ person moves from Delhi to Shimla during the hot summer days. This is an example of which of the following?

$A$ plant species shows several morphological variations in response to altitudinal gradient. When grown under similar conditions of growth,the morphological variations disappear and all the variants have common morphology. What are these variants called?