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
Related Mcqs:
- 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 - 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 - The pyramid that cannot be inverted in a stable ecosystem is the pyramid of:
A. Energy
B. Number
C. Biomass
D. All of these - Which of the following characterizes the biomass in an ecosystem?
A. The biomass of producers is less than the combined biomass of consumers and decomposers
B. No general statement can be made about relative biomass of different ecological groups
C. The biomass of secondary consumers is usually greater than the biomass of primary consumers
D. The biomass of producers is generally greater than the biomass of primary consumers - In lake ecosystem, the pyramid of biomass is:
A. Upright
B. Inverted
C. Anything possible
D. None is correct - The primary productivity is minimum in the following ecosystem:
A. Tropical rainforest
B. Temperate grassland
C. Tropical deciduous forest
D. Desert shrub - The cycling of elements in an ecosystem is called:
A. Chemical cycle
B. Biogeochemical cycle
C. Geological cycle
D. Geochemical cycle - The ecosystem exists in a state of ‘balance’. Supposing one of the heterotrophs, says the rabbit, multiplies and increases in number suddenly then:
A. The balance will be permanently upset because the rabbits will eat the grass in the system and die of starvation
B. The ‘balance’ will be restored by an increase in the wolf population
C. Epidemics will break out in the rabbits and kill all of them
D. Rabbits will starts eating each other - The ecosystem lying in the alpine zone between taiga and polar ice is called:
A. Savana
B. Autotrophic
C. Heterotrophic
D. Tundra - Ecosystem contains:
A. Producers
B. Consumers
C. Decomposers
D. All of the above
