Which one of the following terms does not reflect the idea of ecosystem:

The word ecosystem was coined by:

A. Daubenmire/R.Misra/Koestle

B. Tansley

C. Weaver and Clements

D. Odum/Kormondy

Ecosystem has two components:

A. Plants and animals

B. Weeds and trees

C. Biotic and abiotic

D. Frogs and men

Competition for water, minerals, light and space is most severe between two:

A. Closely related species occupying the same niche

B. Closely related species occupying different niche

C. Unrelated species occupying the same niche

D. Species occupying different overlapping ecosystems

Ecosystem is:

A. Both open and closed unit depending upon the biomass present

B. Closed unit

C. Open unit

D. Both open and closed unit depending upon community type

Each human couple should produce only two children which help in:

A. Checking pollution

B. Fertility of soil

C. Stabilizing the ecosystem

D. Improving food-web