The life-sustaining envelope of the earth is:
The group of organisms that belongs to the same species live in a particular area called:
An area where a community interacts with the non-living environment is called:
Any biological region recognized by its climate or vegetation is called:
The transfer of food material from producers through some organisms with repeated eating and being eaten is called:
The elements in the ecosystem recycle through organisms with the environment is called:
Process where the nitrogenous compound of living organisms convert into nitrates is called:
The cold war between the organisms of a community occupying the same habitat is called:
The association between two different types of organisms which get benefit to each other, cannot live without each other is called:
The amount of solid waste or concentration of gases other than oxygen increase in the atmosphere is called: