A. Chemical cycle
B. Biogeochemical cycle
C. Geological cycle
D. Geochemical cycle
Related Mcqs:
- Exotic species, which brought for plantation from some other country to our country or even from one ecosystem to other ecosystem are called, as exotic species like:
A. Pinus nigra – Japan
B. Euralyptus – Australia
C. Polunia – China
D. All of the above - In a comparative study of grassland ecosystem and pond ecosystem it may be observed that:
A. Primary and secondary consumers are similar
B. Both biotic and abiotic components are different
C. The biotic components are almost similar
D. The abiotic components are almost similar - 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 - Food levels in an ecosystem are called:
A. Trophic levels
B. Consumer levels
C. Producer levels
D. Herbivores levels - The biotic and abiotic components of the ecosystem are connected through:
A. Standing quality
B. Climatic regime
C. Transducers
D. Humification and mineralization - Which of the following terms is not a synonym literally for ecosystem?
A. Ectosome
B. Ecosphere
C. Microcosm
D. Holocene - In a stabilized ecosystem the P/R ratio is:
A. One
B. Less than one
C. More than one
D. Any of these - In an ecosystem, bacteria are considered as:
A. Microconsumers
B. Secondary consumers
C. Primary consumers
D. None of these - Which part of the pond ecosystem does not affect by the temperature:
A. Epilimnion
B. Metalimnion
C. Hypolimnion
D. All of the above
