A. Mineralization
B. Humification
C. Nutrient immobilization
D. Microbe immobilization
Related Mcqs:
- 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 - Non-renewable environmental resources include various metals non-metalic minerals and
A. Coal
B. Natural gas
C. Oil
D. Fossil fuels - Prairies and steppes are parts of the natural regions called:
A. Temperate grasslands
B. Tropical grasslands
C. Prairie grasslands
D. Steppes grasslands - The cycling of elements in an ecosystem is called:
A. Chemical cycle
B. Biogeochemical cycle
C. Geological cycle
D. Geochemical cycle - The river mouth ecosystem is called:
A. Estuarine
B. Lotic
C. Lentic
D. None of these - The ecosystem lying in the alpine zone between taiga and polar ice is called:
A. Savana
B. Autotrophic
C. Heterotrophic
D. Tundra - The ration of food energy assimilated to the food energy ingested is called:
A. Trophic level efficiency
B. Photosynthetic efficiency
C. Net production efficiency
D. Assimilation efficiency - When the number of organisms at successive levels are plotted, they assume the space of a pyramid. This is called the pyramid of:
A. Energy
B. Number
C. Biomass
D. Both (a) and (c) - The rate of storage of food energy at consumer level is called:
A. Secondary productivity
B. Primary productivity
C. Gross productivity
D. Net productivity - Form of forest produced by introducing a young crop beneath an existing immature is called:
A. High forest with standards
B. Two-storied high forest
C. Wedge system
D. None of these
