Term ‘ecology’ was proposed by

$X$ - In deep-sea hydrothermal vents where average temperature is between $25$ to $30^oC$

$Y$ - Reptiles and Amphibians are eurythermal

Distribution of different plant geographically is called

Population density of terrestrial organisms is measured in terms of individuals per

Ozone hole means

The species of plants that play a vital role in controlling the relative abundance of other species in a community are called