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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
Which is not a functional unit of an ecosystem ?A. ProductivityB. DecompositionC. Energy flowD. Stratification |
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Answer» Correct Answer - D The components of the ecosystems are seen to function as a unit, when we consider the following 4 major functional aspects of an ecosystem: 1. Productivity , 2. Decomposition, 3. Energy flow and 4. Nutrient cycling. |
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| 802. |
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?A. Its base is broadB. It shows energy content of different trophic level organismsC. It is inverted in shapeD. It is upright in shape |
| Answer» Correct Answer - C | |
| 803. |
A progressive series of changes in plant and animal life of an area from initial colonization is known as:A. selectionB. revolutionC. specializationD. succession |
| Answer» Correct Answer - D | |
| 804. |
Pyramid of energy in a river ecosystem is:A. constantB. decliningC. always uprightD. always erect |
| Answer» Correct Answer - C | |
| 805. |
Which of the following representations shows the pyramid of numbers in a forest ecosystem?A. B. C. D. |
| Answer» Correct Answer - B | |
| 806. |
Natural reservoir of phosphorus is:A. RockB. FossilsC. Sea waterD. Animals bones |
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Answer» Correct Answer - A Natural reservoir of phosphorus is rock. |
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| 807. |
The biomass available for consumption by the herbivores and the decomposers is calledA. Gross primary productivityB. Net primary productivityC. Secondary productivityD. Standing crop |
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Answer» Correct Answer - D Most of the sites have given the answer to be (2) i.e., net primary productivity which is defined as the total organic matter stored by producers per unit area/volume per unit time. So it is a rate measure. Standing crop is biomass available at a given time. Thus, standing crop seems to be a better choice. Odum says standing biomass or standing crop should not be confused with productivity. For example, a fertile pastures which is being grazed by livestock would likely have a much smaller standing crop of grass than a less productive pasture which is not being grazed at the time of measurement. |
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| 808. |
Match the following and select the correct option : A. a(i),b(ii),c(iii),d(iv)B. a(iv),b(i),c(iii),d(ii)C. a(iii),b(ii) ,c(iv),d(i)D. a(ii),b(i),c(iv),d(iii) |
| Answer» Correct Answer - A | |
| 809. |
The plants convert light into chemical energy with a photosynthetic efficiency ofA. `3-6 %`B. `6-20 %`C. `20-35 %`D. `35-41 %` |
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Answer» Correct Answer - A About 1 - 5% of incident solar energy or 2-10% of PAR is captured by photosyn-thetic organisms in synthesis of organic matter. So the best option is 3 - 6%. |
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| 810. |
Secondary productivity is rate of formation of new organic matter by:A. ConsumersB. DecomposersC. Producers `to` Carnivores `to` Herbivores `to` DecomposersD. Parasites |
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Answer» Correct Answer - A Secondary productivity is rate of formation of new organic matter by consumers. |
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| 811. |
The mass of living material at a trophic level at a particular time is called:A. Standing cropB. Standing stateC. Net primary productivityD. Gross primary productivity |
| Answer» Correct Answer - A | |
| 812. |
The mass of living material at a trophic level at a particular time is calledA. Standing cropB. Gross primary productivityC. Standing stateD. Net primary productivity |
| Answer» Correct Answer - D | |
| 813. |
Identify the incorrect statements from the following.A. Pyramid of energy is mostly upright, but sometimes it may be invertedB. Pyramid of number and biomass may be either upright or invertedC. Pyramid of biomass in sea is generally inverted as the biomass of fish far exceeds that of phytoplanktonsD. Food chains are generally short few trophic levels as only `10%` of the energy is transferred to each trophic level from the lower trophic level |
| Answer» Correct Answer - A | |
| 814. |
Vertical distribution of different species occupying different levels in a biotic community is known asA. divergenceB. stratificationC. zonationD. pyramid |
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Answer» Correct Answer - B Stratification is the vertical distribution of different species occupying of vertical levels in a biotic community. It is formation of vertical layers where vegetation is dense, i.e. 5-7 strata (layer) in tropical rainforests with emergent tall trees, canopy tress, shrub layer below trees layer bottom layer of herbs and grass ground level. Zonation is the horizontal categorisation of biomass into zones based on their distribution or arrangment in habital as determined by environmental factors, e.g. altitude, latitude, temperature , biotic factors, etc. |
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| 815. |
Which one is sedimentary cycle?A. Oxygen cycleB. Nitrogen cycleC. Hydrogen cycleD. Phosphorus cycle |
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Answer» Correct Answer - D Phosphorus and sulphur cycles are sedimentary cycle. |
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| 816. |
the main role of bacteria in the carbon cycle involvesA. photosynthesisB. chemosynthesisC. assimilation of nitrogenous compoundsD. digestion or breakdown of organic compounds |
| Answer» Correct Answer - D | |
| 817. |
Which of the following is a producer ?A. CuscutaB. MushroomC. PhytoplanktonD. Mycoplasma |
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Answer» Correct Answer - C Phytoplankton is a producer. |
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| 818. |
Complete the food chain by filling the link X: Paddy → Grassopper → Frog → X → Hawk(a) King cobra (b) Gorilla (c) Rabbit (d) Tasmanial wolf |
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Answer» (a) King cobra |
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| 819. |
During the process of ecological succession the changes that takes place in communities areA. Orderly and sequentialB. RandomC. Very quickD. Not influenced by the physical environment |
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Answer» Correct Answer - A During the process of ecological succession the changes that take place in communities are orderly and sequential . |
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| 820. |
Which one of the following is the sedimentary cycle?A. Carbon cycleB. Oxygen cycleC. Hydrogen cycleD. Phosphorus cycle |
| Answer» Correct Answer - D | |
| 821. |
Which one is sedimentary cycle ?A. Oxygen cycleB. Nitrogen cycleC. Hydrogen cycleD. None of these |
| Answer» Correct Answer - D | |
| 822. |
Food chain is:A. transfer of chemical energy from producers to consumersB. a number of human beings forming a chain for foodC. animals near a source of foodD. none of the above |
| Answer» Correct Answer - A | |
| 823. |
Energy transfer from one trophic level to other , in a food chain , isA. `10%`B. `20%`C. `1%`D. `2%` |
| Answer» Correct Answer - B | |
| 824. |
Organisms need a constant supply of nutrients forA. GrowthB. ReproductionC. Regulation of various body functionsD. All of the above |
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Answer» Correct Answer - D Organism need a constant supply of nutrients to grow, reproduce and regulate various body functions. |
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| 825. |
Energy and nutrients enter a community throughA. ProducersB. Primary consumersC. DecomposersD. Sunlight |
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Answer» Correct Answer - A Energy and nutrients enter a community through producers. |
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| 826. |
Movement of energy and nutrients from one feeding group of organisms to another in a series is called:A. food chainB. food linkC. trophic levelD. none of these |
| Answer» Correct Answer - A | |
| 827. |
The most important organisms for a biosystem are:A. herbivoresB. carnivoresC. green plantsD. protozoa |
| Answer» Correct Answer - C | |
| 828. |
Match column I with column II: A. P-i, Q-ii, R-iii, S-ivB. P-ii, Q-i, R-iv, S-iiiC. P-ii, Q-iv, R-iii, S-iD. P-iii, Q-ii, R-i, S-iv |
| Answer» Correct Answer - B | |
| 829. |
Standing crop refers to:A. All the living forms in an areaB. All the crop plants in an areaC. All the photosynthetic living forms in an areaD. The amount of living matter in a component population of an ecosystem at any time |
| Answer» Correct Answer - D | |
| 830. |
Extinction of a species in a food chain is compensated by:A. food webB. food chain and decomposersC. ecological pyramidD. none of these |
| Answer» Correct Answer - A | |
| 831. |
Which of the following food chain is in improper sequence?(a) Plants → snake → rabbit → lizard → eagle (b) Plants → grasshopper → lizard → snake → hawk (c) Plants → lizard → rabbit → snake → eagle (d) Plants → rabbit → lizard → hawk → eagle |
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Answer» (b) Plants → grasshopper → lizard → snake → hawk |
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| 832. |
Which of the following is a correct food chain?A. Eagle `rarr` Snake `rarr` Grasshopper `rarr` Grass `rarr` FrogB. Frog `rarr` Snake `rarr` Eagle `rarr `Grasshopper `rarr`GrassC. Grasshopper `rarr` Grass `rarr` Snake `rarr` Frog `rarr` EagleD. Grass `rarr`Grasshopper `rarr` Frog `rarr` Snake `rarr` Eagle |
| Answer» Correct Answer - D | |
| 833. |
Which of the following is the correct sequence in the food chain?A. grass `to` wolf `to` deer `to` buffaloB. bacteria `to` grass `to` rabbit `to` wolfC. grass `to` insect `to` bird `to` snakeD. grass `to` snake `to` insect `to` deer |
| Answer» Correct Answer - C | |
| 834. |
In a tiger reserve, the tiger is placed in the:A. apex of the food chainB. bottom of the food chainC. core of the reserve forestD. centre of complex food web |
| Answer» Correct Answer - A | |
| 835. |
The statement 'Tiger is the apex of food chain' indicatesA. tiger is carnivoreB. tiger has many enemiesC. tiger has maximum biomassD. tiger is dependent upon large number of trees |
| Answer» Correct Answer - A | |
| 836. |
The statement 'Tiger is the apex of food chain' indicates:A. tiger is carnivorousB. tiger has many enemiesC. tiger has maximum biomassD. tiger is dependent upon large number of herbivores and even more number of trees in forest |
| Answer» Correct Answer - A | |
| 837. |
In a food chain, lion is a:A. secondary consumerB. primary consumerC. tertiary consumerD. secondary producer |
| Answer» Correct Answer - C | |
| 838. |
Ecosystem creates:A. Food chainB. Food webC. Both of theseD. None of these |
| Answer» Correct Answer - C | |
| 839. |
Ecosystem createsA. Food chainB. Food webC. Any of the twoD. None |
| Answer» Correct Answer - C | |
| 840. |
The term ecosystem was coined by:A. E.P. OdumB. A.G. TansleyC. E. HaeckelD. E. Warming |
| Answer» Correct Answer - B | |
| 841. |
The term ecosystem was coined byA. AG TansleyB. E HaeckelC. E WarningD. EP Odum |
| Answer» Correct Answer - A | |
| 842. |
Ecological factor important for determining various ecosystem is /areA. lightB. soilC. temperature and precipitationD. All of the above |
| Answer» Correct Answer - D | |
| 843. |
The term ecosystem was coined by:A. P.MaheshwariB. TansleyC. R. MishraD. P. Odum |
| Answer» Correct Answer - B | |
| 844. |
Hydrological cycle is controlled byA. GrasslandsB. ForestsC. PlanktonsD. Epiphytes |
| Answer» Correct Answer - B | |
| 845. |
The bulk of nitrogen in nature is fixed by-A. LighteningB. Chemical industriesC. Denitrifying bacteriaD. Symbiotic bacteria |
| Answer» Correct Answer - D | |
| 846. |
Which one of the following best describes the base of a pyramid of net production ?A. Its size depends on the energy available from detritivoresB. It contains the energy left after the producers have diedC. It represents the energy available to the secondary consumersD. It contains the energy captured by photosynthesis |
| Answer» Correct Answer - D | |
| 847. |
Amount of light is used in the production process by plants ?A. `1-5%`B. `5-10%`C. `20-40%`D. More than `70%` |
| Answer» Correct Answer - A | |
| 848. |
Which biotic components mainly help in recycling of minerals:-A. ProducersB. ConsumersC. DecomposersD. All the above |
| Answer» Correct Answer - C | |
| 849. |
An abandoned agricutural field chaging into mature forest ovor long span of time is an example ofA. allogenic successionB. autogenic successionC. autotrophic successionD. heterotrophic succession |
| Answer» Correct Answer - B | |
| 850. |
The efficiency of any ecosystem is best depicted the pyramid ofA. energyB. numberC. biomassD. volume |
| Answer» Correct Answer - A | |