An ecosystem may be defined as:
A. A localized association of several plants and animals
B. Different communities of plants, animals and microbes, together with their physico-chemical environments
C. Different communities of plants and microbesm plus their physico-chemical environments
D. None of the above
The word ecosystem was coined by:
A. Daubenmire/R.Misra/Koestle
B. Tansley
C. Weaver and Clements
D. Odum/Kormondy
A. Plants and animals
B. Weeds and trees
C. Biotic and abiotic
D. Frogs and men
Which one of the following terms does not reflect the idea of ecosystem:
A. Holocoene
B. Cherposem
C. Biosystem
D. Geobiocoenosis
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
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