Ecosystem — practice questions
72 curated practice questions from Ecosystem (Biology NEET, NTA Exams) — 26 easy, 21 medium, 25 hard. Every question includes the final answer free; step-by-step worked solutions with a free account.
- In an ecosystem the rate of production of organic matter during photosynthesis is termied as:
- The rate of formation of new organic matter by rabbit in a grassland, is called:
- If 20 J energy is available at producer level then how much energy will be transferred to the lion in the food chain…
- Which of the following is expected to have the highest value (gm/m 2 /yr) in a grassland ecosystem?
- In relation of Gross primary productivity and Net primary productivity of an ecosystem, which one of the following…
- What percentage of Net Primary Productivity of a terrestrial ecosystem is taken up by herbivores?
- Which biogeochemical cycle does not have losses due to respiration?
- Given below are two statements: Statement I: If 10,000 J of energy is trapped by producers, the energy available to…
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- The type of ecosystem with the highest mean plant productivity is:
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- Net amount of biomass stored by producers per unit area per unit time, after compensating respiratory expense is called:
- In a climax community which is constant over a long period
- Which of the following ecological pyramids can never occur in an inverted form?
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- Vertical distribution of different species occupying different levels in a biotic community is known as:
- The average net primary productivity of which of these community is highest?
- Correct sequence of communities in primary succession in water is
- The great barrier reef along the east coast of Australia can be categorized as:
- Given below are two statements: Statement I : During leaching step of Decomposition, nutrients released become…
- Given below are two statements: Statement I : The primary source of energy in an ecosystem is solar energy. Statement…
- Lichen is the pioneer vegetation of which type of succession?
- Reservoir of which biogeochemical cycle is located in Earth's crust Sulphur Phosphorous Nitrogen Carbon
- Which one of the following is not used for the construction of ecological pyramids?
- Given below are two statements: Statement I : A single organism can occupy different trophic levels. Statement II …
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- In an aquatic ecosystem, the trophic level equivalent to cows in grasslands is:
- The breakdown of detritus into smaller particles by earthworm is a process called:
- Flow of energy through different trophic levels in an ecosystem is
- Given below are two statements: Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers…
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- Which of the following is a characteristic feature of cropland ecosystem?
- Given below are two statements: Statement I : Secondary production pertains to biomass transferred into herbivores…
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
- The mass of living material at a trophic level at a particular time is called:
- Sudden death of fishes from reduction of oxygen reduction more likely occurs in:
- Arrange following plants; Grass shrubby plants, Teak, Amaranthus in vertical stratification of a forest
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- Which of the following pair is a sedimentary type of biogeochemical cycle?
- Given below are two statements: Statement I : Unit of primary production is g m -2 or Kcal m -2 . Statement II : Unit…
- In exclusively terrestrial grassland ecosystem, peacock occupy the trophic level:
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- How do frogs help farmers and maintain ecological balance?
- If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the…
- Reservoir for gaseous type of biogeochemical cycle is in
- Which of the option shows following example in ascending order in terms of BOD [GUJCET 2014] (i) Distilled water (ii)…
- In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100x (kcal m –2 ) yr –1 , what would be…
- The biomass available for consumption by the herbivores and the decomposers is called:
- Which one of the following is not a limitation of ecological pyramids?
- Which one of the following statement for pyramid of energy is incorrect?
- Bamboo plant is growing in a far forest then what will be the trophic level of it?
- Which of the following ecological pyramids is generally inverted?
- Numbers of trophic levels in ecosystem is limited due to
- Given below are two statements: Statement I : Ecosystem can be both natural as well as man made. Statement II : Crop…
- Major autotrophic biomass in oceans is contributed by [CBSE PMT 2000]
- When the number of organisms at successive trophic levels are plotted they assume the shape of a pyramid. This is…
- If carbon atom fixed by producer has passed through 3 species, trophic level of last species is
- In ecological succession, changes occurring in communities are
- An ecosystem which can be easily damaged but can recover after sometime if damaging effect stops, will be having:
- Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
- If decomposers are removed what will happen to the ecosystem?
- Rate of assimilation of energy at herbiovore level is called
- Which statements is/are true regarding productivity of an ecosystem Nature tends to increase GPP Man tends to decrease…
- Given below are two statements: Statement I : Standing state is the amount of nutrients present in the soil at any…
- A community of organisms interacting with abiotic environmental factors constitute:
- Productivity of an ecosystem is expressed in term of (Kcal m -2 )yr -1 (Kcal m -3 )yr -1 g m -1 yr -1 g m -2 yr -1
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT - 1…
- Consider the following statements concerning food chains: (1) removal of 80% tigers from an area resulted in greatly…
- The food chain in which microbes breakdown energy rich compounds synthesized by producers is called:
- Which of the following statements is incorrect regarding the phosphorus cycle?
- Total amount of energy reaching upper trophic level is determined by:
- Which of the following is the unit of productivity of an Ecosystem?