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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.
| 1301. |
Which one of the following processes during decomposition is correctly described?A. Fragmentation - Carried out by organisms such as earthwormB. Humification - Leads to the accumulation of a dark coloured sustance humus, which resistant to microbial action at a very fast rateC. Carabolism - Last step in the decomposition under fully anaerobic conditionD. Leaching - Water soluble inorganic nutrients rise to the top layers of soil |
| Answer» Correct Answer - A | |
| 1302. |
Which one of the following processes during decomposition is correctly described?A. Fragmention - Carried out by organisms such as earthwormB. Humification- Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rateC. Catabolism - Last step in the decomposition underfully anaerobic conditionD. Leaching- Water soluble inorganic nutrients rise to the top layers of soil |
| Answer» Correct Answer - A | |
| 1303. |
Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same times?A. SparrowB. LionC. GoatD. Frog |
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Answer» Correct Answer - A • Frog and lion are carnivorous • Goat is herbivorous • Sparrow is omnivorous. |
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| 1304. |
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?A. Phosphorus cycleB. Nitrogen cycleC. Carbon cycleD. Sulphur cycle |
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Answer» Correct Answer - A Sulphur cycle has both gaseous and sedimentary phases. |
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| 1305. |
Which one of the following processes during decomposition is correctly described?A. Catabolism - Last step in the decomposition under fully anaerobic conditionB. Leaching - Water soluble inorganic nutrients rise to the top layers of soilC. Fragmentation - Carried out by organism such as earthwormD. Humification - Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate |
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Answer» Correct Answer - C (a) False, All the three processes i.e., Fragmentation, leaching and catabolism operate simultaneously and is followed by humification and Mineralisation. The process of decomposition is largely an oxygen requiring process. (b) False, Leaching is the moving down of water soluble inorganic nutrients into the soil horizon. (c ) True (d) False, Humus is highly resistant to microbial action and gets decomposed at a very slow rate. |
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| 1306. |
Mass of living matter at a trophic level in an area at any time is calledA. HumusB. Standing cropC. Standing stateD. Detritus |
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Answer» Correct Answer - B Mass of living matter at a trophic level in an area at any time is called standing crop. |
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| 1307. |
Which one of the following statements for pyramid of energy is incorrect whereas remaining three are correct?A. It is upright in shape.B. Its base is broad.C. It shows energy content of different trophic level organismsD. It is inverted in shape. |
| Answer» Correct Answer - D | |
| 1308. |
Which one of the following statements for pyramid of energy is incorrect whereas remaining three are correct?A. Its base is broadB. It is upright in shapeC. It is inverted in shapeD. It shows energy content of different trophic level organisms |
| Answer» Correct Answer - C | |
| 1309. |
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?A. It show energy content of different trophic level of organismsB. It is inverted in shapeC. Its is upright in shapeD. Its base is broad |
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Answer» Correct Answer - B Pyramid of energy is graphic representation of energy per unit area sequence - wie in various rising trophic levels with producers at the base and top carnivores at the apex. Pyramid of energy is upright in all cases. |
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| 1310. |
In an area where DDT had been used extensively, the population of birds declined significantly because:A. Earthworms in the area got eradicatedB. Crobes were feeding exclusively on birdsC. Many eggs laid by birds did not hatchD. Birds stopped laying eggs |
| Answer» Correct Answer - C | |
| 1311. |
The second stage of hydrosere is occupied by plants likeA. ZollaB. TyphaC. CarexD. Vallisneria. |
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Answer» Correct Answer - D Second stage of hydrosere is represented by submerged plants. The bottom lined by soft mud having organic matter is favourable for growth of sumerged plants like Hydrilla, Potamogeton, Vallisneria and Najas. They are rooted in the mud and form dense growth. |
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| 1312. |
The second stage of hydrosere is occupied by plants likeA. SalixB. VallisneriaC. AzollaD. Typha |
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Answer» Correct Answer - B Second stage of hydrasere is occupied by plants like Vallisneria. |
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| 1313. |
Which one of the following statements is correct for secondary succession?A. It occurs on a deforested siteB. It follow pramery successionC. it is similar to primary succession except that it has a relatively fast paceD. It begins on a bare rock |
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Answer» Correct Answer - A Secondary succession of subere is ecological succession that takes place in a recently denuded area which still contains a lot of organic debris, remains and propagules of previous living organisms. It is more common and caused by baring of an area due to the forest fires, deforest fires, deforestation, excessive overgrazing, landslides, earthquakes, repeated floods, etc. |
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| 1314. |
Identify the possible link 'A' in the following food chain : Plant `rarr` insect `rarr` frog `rarr` 'A' `rarr` eagle:A. WolfB. CobraC. ParrotD. Rabbit |
| Answer» Correct Answer - B | |
| 1315. |
The second stage of hydrosere is occupied by plants likeA. AzollaB. TyphaC. salixD. Vallisneria |
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Answer» Correct Answer - D Vallisneria is at second stage of hydrosere. It starts orginating in a pond with colonisation of some phytoplanktons which forms the pioneer plant community. The stages are Ist -Bacteria , blue-green algae and algae Iind-Hyndrilla , Potamogeton and Vallisneria IIIrd-Nelumbo , Nymphaea , Trapa , Azolla and Wolffia IV th -Typha and Sagitaria Vth- Juncus and Cyperus VIth-Salix and Populus , Almus. |
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| 1316. |
Identify the possible link 'A' in the following food chain : Plant `rarr` insect `rarr` frog `rarr` 'A' `rarr` eagle:A. RabbitB. WolfC. CobraD. Parrot |
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Answer» Correct Answer - C The given food chain should be Plant `to` Insect `to` Frog `to ` Cobra `to ` Eagle |
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| 1317. |
Identify the likely organisms (a), (b), (c) and (d) in the food web shown: |
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Answer» Correct Answer - A In the given food web option (a) is correct as producers utilise the radiant energy of sun which is transformed to chemical from during photosynthesis. Thus, green plants occupy the secondary trophic level. The herbivores constitute the secondary trophic level and the carnivores the third trophic level. deer is herbivores, rabbit, and rat are also herbivores but frog eats the grasshoppers. also deer is een eaten by lion. |
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| 1318. |
In the given food web, and increase in the population of hawks will not result in A. decrease in the population of rabbits and sankesB. decrease in the population of mouseC. decrease in the population of lizardsD. increase in the population of grasshoppers. |
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Answer» Correct Answer - D In the given food web, hawk is the top carnivore feeding upon lizard, rabbit snake and mouse. So, if the population of hawks would increase, they would feed more on rabbit, snake, mouse and lizards which will result in decrease of their population. Due to less number of predators (lizards), population of grasshopper will increase. |
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| 1319. |
Mathc column I with column II and select the correct option from the given codes. `{:("Column I","Column II"),("Standing state",(i)"Fast and nearly perfect"),("Gaseous cycles",(ii)"Amount of nutrients present in soil at given time"),("Standing crop",(iii)"Slow and less perfect"),("Sedimentary cycles",(iv)"Mass of living matter in a unit area"):}`A. ii,I,iv,iiiB. iii,I,iv,iiC. I,iii,ii,ivD. ii,iii,iv,i |
| Answer» Correct Answer - A | |
| 1320. |
Mathc column I with column II and select the correct option from the given codes. `{:("column I","Column II"),("Presence of 3-4 storeyed",(i)"Blue green angle"),("A biome having grasses with scattered trees",(ii)"Stratification"),("Man made ecosystem",(iii)"Savannah"),("Pioneer in hydrosere",(iv)"Dam"):}`A. ii,iii,iv,iB. ii,iii,I,ivC. I,iii,iv,iiD. iii,iv,ii,i |
| Answer» Correct Answer - A | |
| 1321. |
During the process of decompositonA. `CO_(2)` is consumed and `O_(2)` is releasedB. `O_(2)` is consumed and `CO_(2)` is relesedC. `CO_(2)` is consumed and `H_(2)O` is releasedD. None of these |
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Answer» Correct Answer - B Decomposition is the process that concerns breakdown of complex organic matter by decomposers to inorganci raw materials like carbon dioxide, water and various nutrients. Oxygen is required by aerobic bacteria for decomposition. |
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| 1322. |
Mathc column I with column II and select the correct option from the given codes. `{:("column I","column II"),("Gross primary productivity",(i)"Geen plants"),("Secondary productivity",(ii)"Rate of synthesis of organic matter by consumers"),("Transducers",(iii)"Total organic matter produced from solar energy"),("Food web",(iv)"Interconnection of food chains"):}A. I,ii,iii,ivB. iii,ii,I,ivC. iii,iv,I,iiD. ii,I,iv,iii |
| Answer» Correct Answer - B | |
| 1323. |
Match column I with column II and select the correct option from the given codes. `{:("column I","Column II"),("Gross primary productivity",(i)"Selt-ustainable"),("Net primary productivity",(ii)"Aquatic ecosystem"),("Pond",(iii)O_(2)"requiring process"),("Aquarium",(iv)"Photosynthetic production"),("Decompositon",(v)"Available to secondary consumers"):}`A. iv,ii,I,iii,vB. iv,v,I,ii,iiiC. I,iii,ii,iv,vD. ii,I,iii,v,iv |
| Answer» Correct Answer - B | |
| 1324. |
Plant Decomposers belongs to:-A. Monera and fungiB. Fungi and plantsC. Protista and animaliaD. Animalia and monera |
| Answer» Correct Answer - A | |
| 1325. |
Differentiate between Hydrarch and a Xerarch succession. |
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Answer» Hydrarch Succession : Starts in water proceeds from hydric (aquatic) to mesic (neither dry nor wet) situations. Xerarch succession : Starts on barren rock Proceeds from Xeric (dry) conditons. |
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| 1326. |
Why is an earthworm called a detritivore? |
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Answer» This is because earthworm breaks down detritus into smaller particles |
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| 1327. |
Differentiate between a detritivore and a decomposer giving an example of each. |
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Answer» Detritivores are the primary consumers of a detritus food chain which feed upon the detritus and include protozoan, bacteria, and fungi, while decomposers form the last trophic level of both detritus and grazing food chains and break down complex organic compounds of dead plants and animals and include bacteria and fungi. |
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| 1328. |
In an ecosystem, the species composition is determined by (a) Identification of plant species (b) Identification of animal species. (c0 Enumeration of plant species (d) Enumeration of animal speciesA. a and bB. c and dC. a and cD. a , b , c, and d |
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Answer» Correct Answer - D Identification and enumeration of plant & animal species of an ecosystem gives its species composition. |
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| 1329. |
The number of trophic levels in an ecosystem are limited. Comment. |
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Answer» In a food chain, only 10% of the total amount of energy is passed on to the next trophic level from the previous trophic level. So, there is a decrease in the amount of energy available at the successive trophic levels. As we move higher up in the food chain the amount of energy diminishes to a level at which it cannot sustain any trophic level, thereby limiting the number of trophic levels. |
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| 1330. |
Given below is a figure of an ecosystem. Answer the following questions? (i) What type of ecosystem is shown in the figure? (ii) Name any plant that is characteristic of such ecosystem. |
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Answer» (i) It is a tropical deciduous forest ecosystem. (ii) In India this type of forest ecosystem is characterised by Tectona, Dipterocarpus Jamun Amla, Palas. mahua and Semul plants. |
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| 1331. |
Final community that is in near equilibrium with environment in ecological succession is called ........... |
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Answer» Climax community |
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| 1332. |
What is common to earthworm, mushroom, soil mites and dung beetlein an ecosystem. |
| Answer» They all are designated as primaty consumer in a detritus food chain and are termed detritivores. | |
| 1333. |
Ecosytem isA. OpenB. ClosedC. Both open and closeD. Neither open nor closed |
| Answer» Correct Answer - A | |
| 1334. |
In the equation, GPP-R = NPP; If NPP = Net primary productivity.Explain GPP – R = NPP |
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Answer» Gross primary productivity minus respiration losses (R) is the net primary productivity (NPP). That means Net primary productivity is the available biomass for the consumption of heterotrophs (herbivores and decomposers). |
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| 1335. |
Rate of biomass production is called productivity and can be divided into GPP and NPP:(a) Define GPP and NPP.(b) How can we relate GPP and NPP? |
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Answer» (a) GPP – Gross primary productivity NPP – Net primary productivity (b) NPP = GPP-R |
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| 1336. |
GPP-R= NPP is an equation indicating productivity. Illustrate the terms denoted in the equation. |
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Answer» GPP is the gross primary productivity which is the rate of production of organic matter during photosynthesis. R- is the respiration loses which is the amount of GPP utilized by plants in respiration. NPP is the available biomass for the consumption to heterotrophs. (Herbivores and Decomposers). |
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| 1337. |
Which of the following relations is correct regarding GPP and NPP of an ecosystem ?A. NPP=GPP-Animal consumptionB. NPP=GPP-Plant respirationC. NPP=GPP-Plant respirationD. NPP=GPP+Animal consumption |
| Answer» Correct Answer - C | |
| 1338. |
Expand GPP and NPP. Differentiate between the two. |
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Answer» GPP stands for Gross Primary Productivity. It is the rate of production of organic matter during photosynthesis in an ecosystem. NPP stands for Net Primary Productivity. It is defined as GPP - Respiratory loss. |
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| 1339. |
Succession and evolution had occurred simultaneously. |
| Answer» Correct Answer - True | |
| 1340. |
Source of energy in ecosystem isA. SunB. Sugar produced in photosynthesisC. Green plantsD. ATP |
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Answer» Correct Answer - A Source of energy in ecosystem in Sun. |
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| 1341. |
Which of the following words is related to Homo sapiens?A. HerbivoreB. CarnivoreC. AutotrophD. Omnivore |
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Answer» Correct Answer - D Because they can eat both plants and animals. |
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| 1342. |
An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be havingA. Low stability and high resilienceB. High stability and low resilienceC. Low stability and low resilienceD. High stability and high resilience |
| Answer» Correct Answer - D | |
| 1343. |
The maximum biological magnification of `DDT` through food web is seen inA. AlgaeB. BacteriaC. Higher plantsD. Man |
| Answer» Correct Answer - D | |
| 1344. |
Which of the following is a primary consumer in maize field ecosystem ?A. LionB. GrasshopperC. WolfD. Phytoplankton |
| Answer» Correct Answer - A | |
| 1345. |
If we completely remove decomposers from an ecosystem, the ecosystem functioning will be adversely affected because-A. Energy flow will be blockedB. hHerbivores will not receive solar energyC. Mineral movement will be blockedD. Rate of decomposition will be very high |
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Answer» Correct Answer - C Decomposers like fungi, bacteria and actinomycetes are also called mineralisers as they release minerals trapped in organic matter. Thus, they help in recycling of minerals, so if we completely remove decomposers the mineral movement will be blocked. |
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| 1346. |
If we completely remove the decomposers from an ecosytem, the ecosytem functioning will be adversely affected becauseA. Mineral movement will be blockedB. Herbivores will not receive solar energyC. Energy flow will be blockedD. Rate of diocmposition of other components will be very high |
| Answer» Correct Answer - A | |
| 1347. |
When man eats fish, which feeds on zooplankton, which have eaten small plants, the producer in the chain is:A. ZooplanktonB. Small plantsC. FishD. Man |
| Answer» Correct Answer - D | |
| 1348. |
If we completely remove the decomposers from an ecosystem, its functionling will be adversely affected, becauseA. Mineral movement will be blockedB. The rate of decomposition will be very highC. Energy flow will be blockedD. Herbivores will not receive soalr energy |
| Answer» Correct Answer - D | |
| 1349. |
The dominant second trophic level , in a lake ecosystem , isA. PhytoplanktonsB. ZooplanktonsC. BenthosD. Submerged rooted vegetation |
| Answer» Correct Answer - D | |
| 1350. |
The second trophic level of longer food chains in a lake is:A. fishesB. benthosC. zooplanktonD. phytoplankton |
| Answer» Correct Answer - C | |