A. A functional unit of biotic and abiotic components which have an energy source
B. Either a part of land surface, a body of fresh water or the open oceans
C. A functional unit consisting of sunlight, air water and minerals
D. A system consisting of an energy source, producers and consumers
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 - The trophic level of lion is a forest ecosystem is:
A. T3
B. T4
C. T2
D. T1 - If precise quantitative measurements are made on a convened ecosystem in a laboratory, we will find amounts of which of the following to be a one-way flow rather than cyclic?
A. Carbon
B. Potassium
C. Nitrogen
D. Free energy - The pyramid of numbers in a grassland ecosystem will be:
A. Linear
B. Upright
C. Irregular
D. Inverted - The river mouth ecosystem is called:
A. Estuarine
B. Lotic
C. Lentic
D. None of these - 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
