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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.
| 451. |
In some shallow South American lakes visiting flamingoes and resident fishes compete for their common food, theA. PhytoplanktonB. ZooplanktonC. InsectsD. Both A and B |
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Answer» Correct Answer - B In some shallow South American lakes visiting flamingoes and resident fishes compete for their common food, the zooplankton. |
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| 452. |
During any ecological investigation in a population, the evaluation is in the terms ofA. Increase in the population sizeB. Decrease in the population sizeC. Any change in the population sizeD. Constancy in the population size |
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Answer» Correct Answer - C During any ecological investigation in a population, the evaluation is in the terms of any change in the population size. |
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| 453. |
If the age distribution is plotted for the population, the resulting structure is calledA. Growth modelB. Growth rateC. Age pyramidD. Ecological pyramid |
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Answer» Correct Answer - C If the age distribution is plotted for the populations, the resulting structure is called age pyramid. |
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| 454. |
The formula, dN/dt = g representsA. environmental resistanceB. vital indexC. carrying capacityD. exponential growth |
| Answer» Correct Answer - D | |
| 455. |
Human population showsA. J-shaped growth curveB. Z-shaped growth curveC. S-shaped growth curveD. All of the above |
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Answer» Correct Answer - C Human population shows S-shpaed or sigmoid growth curve. |
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| 456. |
Altruistic behavior is not found inA. White antsB. Spotted deerC. Honey beesD. Bitch |
| Answer» Correct Answer - D | |
| 457. |
Which statement is not related to S-shaped population curve?A. Environmental resistance suddenly becomes effective.B. Exponential phase is followed by decline phase.C. Mass mortality and population crash occurs.D. Both (1) and (3). |
| Answer» Correct Answer - D | |
| 458. |
Exponential growth in human population is done inA. lag phaseB. log phaseC. plateau stageD. first stage |
| Answer» Correct Answer - B | |
| 459. |
Which of the following pairs contributes to an increase in population ?A. Emigration and natalityB. Natality and immigrationC. Mortality and emigrationD. Immigration and mortality |
| Answer» Correct Answer - B | |
| 460. |
Which of the given age pyramid reflects a stable human population ?A. B. C. D. |
| Answer» Correct Answer - C | |
| 461. |
The formula for exponential population growth isA. dN/dt = r NB. dt/dN = r NC. dN/rN = dtD. r N/dN = dt |
| Answer» Correct Answer - A | |
| 462. |
The formula for exponential population growth isA. Environmental resistanceB. Reproductive potentialC. Growth rateD. Carrying capacity |
| Answer» Correct Answer - A | |
| 463. |
Which one of the following is a matching pair of certaiin organism(s) and the kind of association?A. Shak and sucker fish - CommensalismB. Algae and fungi in lichens- MutualismC. Orchids growing on trees-ParasitismD. Cuscutta (dodder) growing on other flowering plants-Epiphytism |
| Answer» Correct Answer - B | |
| 464. |
Which pair is mismatched?A. Tundra-PermafrostB. Savannah-Acacia treesC. Praires-EpiphytesD. Coniferous forest-Evergreen trees |
| Answer» Correct Answer - C | |
| 465. |
Which one of the following is correct matching of a plant, its habit and forest type where it normally occurs?A. Prospis, tree, scrubB. Saccharum officinaurum, grass, forestC. Shorea robusta, herb, tropical rain forestD. Acacia catechu, tree, coniferous forest. |
| Answer» Correct Answer - A | |
| 466. |
Which one is a correct matching of plnt, its habitat and the forest type where it normally occursA. Prosopis-tree-scrubB. Saccharum-grass-forestC. Shorea robusta-herb-tropical rain forestD. Acacia catechu-tree-coniferous forest |
| Answer» Correct Answer - A | |
| 467. |
Two different types of plant species living together at a place representA. Plant coenosisB. ZoocoenosisC. Plant communityD. Ecotype |
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Answer» Correct Answer - C Two different types of plant species living together at a place represent plant community. |
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| 468. |
What are saprobionts ? Give examples . |
| Answer» Saprobionts are animals that feed on the remains of dead animals and other refuse , e.g., vultures , crows . | |
| 469. |
Which one of the following organisms reproduce sexually only once in its life time?A. Banana plantB. MangoC. TomatoD. Eucalyptus |
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Answer» Correct Answer - A Banana, Bamboo and pacific salmon fish reproduces only in their time. |
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| 470. |
What is a mimic ? |
| Answer» An organism that resembles another organism or a nonliving object in form , colour and behaviour . | |
| 471. |
What are hyperparasites ? Mention a specific case. |
| Answer» Parasites living on other parasites . Plasmodium in female Anopheles mosquito . | |
| 472. |
(i) What is the interaction between two species called ? (ii) Name the association in which one species producers poisonous substance or a change in environmental conditions that is harmful to another species . |
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Answer» Correct Answer - (i) Interspecific interaction (ii) Amensalism . |
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| 473. |
Write a note on consumers . |
| Answer» Consumers are the organisms which depend directly or indirectly on producers for survival . These include mainly the animals . | |
| 474. |
A population has more young individuals compared to the older individuals. What would be the status of the population after some years ?A. It wil declineB. It will stabileseC. It will increaseD. I will first decline and then stabilise |
| Answer» Correct Answer - C | |
| 475. |
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?A. It will declineB. It will stabiliseC. It will increaseD. It will first decline and then stabilise |
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Answer» Correct Answer - C A population has more young individuals compared to the older individuals. After some years population will increase. |
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| 476. |
Difference between saprotrophs and phagotrophs . |
| Answer» Saprotrophs absorb predigested food through their body surface . Phagotrophs take food via mouth and digest it in their body . | |
| 477. |
Proportion of young individuals is highest in case ofA. Declining populationB. Stable populationC. Both A and BD. Expanding population |
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Answer» Correct Answer - D Proportion of young individuals is highest in case of expanding populations. |
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| 478. |
What is meant by the term plankton ? |
| Answer» Microscopic floating organisms constitute plankton . These include diatoms , blue-green algae , green flagellates forming phytoplankton , and protozoans , rotifers , tiny crustaceans forming zooplankton. | |
| 479. |
What are producers and consumers ? |
| Answer» Producers are organisms that manufacture organic food from simple inorganic compounds by photosynthesis , consumers are organisms that get food eating producers or their products. | |
| 480. |
Root cap is absent inA. XerophytesB. MesophytesC. HydrophytesD. Halophytes |
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Answer» Correct Answer - C Root cap is absent in hydrophytes. |
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| 481. |
At symptome stage, the population isA. stabilisedB. increasingC. decreasingD. changing |
| Answer» Correct Answer - A | |
| 482. |
List the ecological principles operating in a pond . |
| Answer» Food relationship , interactions and recycling of nutrients . | |
| 483. |
Root cap is absent inA. MesophytesB. HydrophytesC. EpiphytesD. Xerophytes |
| Answer» Correct Answer - B | |
| 484. |
Sigmoid curve isA. Rate of transportationB. Rate of respirationC. Rate of photosynthesisD. Growth of population |
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Answer» Correct Answer - D Sigmoid curve is growth of population. |
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| 485. |
Which part of pond ecosystem does not get affected by temperature?A. EpilimnionB. MetalimnionC. HypolimnionD. All |
| Answer» Correct Answer - C | |
| 486. |
At asymptote stage, the population isA. StabilisedB. IncreasingC. DecreasingD. Changing |
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Answer» Correct Answer - A At asymptote stage, the population is stablised. |
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| 487. |
Forest floors, tree canopies and edges of a pond are the examples ofA. microclimateB. nicheC. microecologyD. microhabitat |
| Answer» Correct Answer - D | |
| 488. |
Scholars caught marked and released 80 fishes in a pond. Later 100 fishes were caught at random. 40 of them were marked. The number of fishes in the pond isA. 400B. 200C. 100D. 50 |
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Answer» Correct Answer - B From mark and recapture method: N=(MR)/r` where, N-Population density. M-Number of marked fishes. R-Total numbe of recaptured fishes. r- Number of recaptured fishes that are marked. (M=80, R=100, r=40) `N=(80 xx 100)/40=200` |
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| 489. |
Which part of the world has high density of organisms?A. GrasslandsB. SavannahsC. Decidous forestsD. Tropical rain forests |
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Answer» Correct Answer - D Tropical rain forests has high density of organisms. |
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| 490. |
Plants growing on sandstone areA. PsammophytesB. OxylophytesC. LithophytesD. Phanerophytes. |
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Answer» Correct Answer - C Plants growing on sandstone are lithophytes. |
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| 491. |
Geographic limit within which a population exists is calledA. BiomeB. EcosystemC. NicheD. Habitat |
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Answer» Correct Answer - D Geographic limit within which a population exists is called habitat. |
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| 492. |
Soil salinity is measured byA. PrometerB. PotometerC. CalporimeterD. Conductivity meter |
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Answer» Correct Answer - D Soil salinity is measured by conductivity meter. |
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| 493. |
Large unit of land having different communities is calledA. BiomeB. EcosystemC. NicheD. Biosphere |
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Answer» Correct Answer - A Large unit of land having different communities is called biome. |
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| 494. |
Biome isA. The fauna of an oceanB. The flora of landC. Communities of organisms interacting with one anotherD. The part of the earth and its atmosphere which is inhabited by living organisms |
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Answer» Correct Answer - C Biome is commnities of organism interacting with one another. |
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| 495. |
Deserts, grasslands, forests and tundra are example ofA. BiomesB. PopulationsC. Biogeographical regionsD. Biospheres |
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Answer» Correct Answer - A Deserts, grasslands, forests and tundra are example of biomes. |
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| 496. |
Niche of a species isA. position of species in a community in relation to other speciesB. place where organism livesC. place where organism lives and performs its dutyD. place where population perform their duties |
| Answer» Correct Answer - C | |
| 497. |
Niche of a species isA. Place of livingB. Specific functions and competitive powerC. Habitat and specific functionsD. None of the above |
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Answer» Correct Answer - C Niche of a species is habitat and specific function. |
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| 498. |
Egrets are often seen along with grazing cattle . How do you refer to this interaction ? Give a reason for this association . |
| Answer» Correct Answer - (i) Commensalism . | |
| 499. |
find the odd one w.r.t. parasitismA. CuscutaB. Liver flukeC. Female mosquitoD. Plasmodium |
| Answer» Correct Answer - C | |
| 500. |
The term 'niche' of a species refers to:A. Spciefic place where an organisms livesB. Competitive power of an orgnismC. Specific function of an organismD. Specific and habitual function. |
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Answer» Correct Answer - D The term niche of a species referst to specific and habittual function. |
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