A. Always temporary
B. Always permanent
C. Either of these
D. Rarely permanent
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 trophic structure in an ecosystem is in fact:
A. Producer-consumer arrangement
B. Refers to grazing food chain only
C. Never forms a food web
D. Never photosynthesis dependent - Ecosystem has two components:
A. Plants and animals
B. Weeds and trees
C. Biotic and abiotic
D. Frogs and men - An ecosystem is: ___________?
A. A community of organisms interacting with one another
B. The abiotic component of an area
C. The part of the earth and its atmosphere where living organisms exist
D. A community of organisms together with the environment in which they live - The minimum number of components required for an ecosystem to survive:
A. Producer and primary consumer
B. Producer and decomposer
C. Primary consumer and decomposer
D. Primary and secondary consumer
E. Producer and secondary consumer - The decomposers in an ecosystem constitute the following trophic level:
A. T1
B. T3
C. T5
D. T4 - The gross production minus losses in an ecosystem is indicated as:
A. Net production
B. Secondary production
C. Net storage
D. Net primary production - Energy enters into the ecosystem through:
A. Herbivores
B. Carnivores
C. Producers
D. Decomposers - Bacteria and fungi in a forest ecosystem are generally:
A. Producers
B. Decomposers
C. Primary consumers
D. Secondary consumers
E. Tertiary consumers
The correct answer to the question: "An ecosystem is a structure that is:" is "Either of these ".
