All types of latitudinal biomes are found telescoped on high hills found in

$A$ 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?

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

Bottom dwelling animals constitute:

Give scientific reasons: Freshwater animals cannot survive for long in seawater.

The forests near the equator are known as .....