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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.
| 351. |
The monarch butterfly is highly distateful to its predator (bird) because of a special chemical present in its body. The butterfly acquires this chemical during itsA. Larval stage by feeding on a poisonous seedB. Caterpillar stage by feeding on a poisonous seedC. Caterpillar stage by feeding on a poisonous weedD. Any of the above |
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Answer» Correct Answer - C The monarch butterfly is highly distasteful to its predator(bird) because of a specific chemical present in its body. The butterfly acquires this chemical during its caterpillar stage by feeding on a poisonnous weed. |
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| 352. |
What are the key elemens that lead to so mych variation in the physical and chemical condition of different habitats?A. Physico-chemical componentsB. Temperature, water and light and soilC. Abiotic factorsD. All of the above |
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Answer» Correct Answer - D Physico-chemical components, temperaturee, water, light, soil and abiotic factors are the key elements that lead to so much variation in the physical and chemical condition of different habitats. |
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| 353. |
Most ecologically relevant environment factor isA. TemperatureB. WaterC. LightD. Soil |
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Answer» Correct Answer - A Most ecologicaly, relevant environmental factor is temperature. |
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| 354. |
In a population, unrestricted reproductive capacity is called as -A. biotic popentialB. fertility rateC. carrying capacityD. birth rate |
| Answer» Correct Answer - A | |
| 355. |
Fill in the blanks : Population have characteristic patterns of growth with time . Two contrasting types of growth forms are `………..` and `…………` . |
| Answer» Correct Answer - S-shaped (sigmoid ) , J-shaped | |
| 356. |
In the rocky communities of the Americal Pacific Coast which is an important predatorA. Barnacle BalanusB. Barnacle ChthamalusC. Both A and BD. Starfish Pisaster |
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Answer» Correct Answer - D In the rocky intertidl communities of the American Pacific Coast the starfish Pisaster is an important predator. |
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| 357. |
Which biome has the highest species diversity?A. ChaparralB. TundraC. Tropical rainforestD. Desert |
| Answer» Correct Answer - C | |
| 358. |
In the equation for S-shaped population growth, representsA. Carrying capacityB. Environmental resistanceC. Biotic potentialD. Population size |
| Answer» Correct Answer - C | |
| 359. |
Number of births per year per 1000 individuals isA. DemographyB. NatalityC. MotalityD. Density |
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Answer» Correct Answer - B Number of births per year 1000 individuals is natality. |
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| 360. |
What does a J-shaped growth curve of population Indicate ? |
| Answer» Starvation and mass mortality . | |
| 361. |
Which of the following statements is not true for J-shaped growth curve?A. Exponential phase is prolonged.B. Population never grows beyond carrying capacity.C. Population crash occurs.D. Population seldom reaches equilibrium. |
| Answer» Correct Answer - B | |
| 362. |
Fill in the blanks: 1. The mechanism used by most mammals to regulate their body temperature are similar to the ones that ..a..use. 2. Human maintain a constant body temperature of ..b.. 3. In summer body temperature is maintained by ..c.. 4. ..d..do not have any mechanism to maintain internal temperatures.A. a`-`plants, b`-``98.6^o `C, c`-`sweating, d`-`vertebratesB. a`-`humans, b`-``37^o `C, c`-`shivering, d`-`plantsC. a`-`invertebrates, b`-``37^o`C, c`-`sweating, d`-`plantsD. a`-`humans, b`-`37^o`C, c`-`sweating, d`-`plants |
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Answer» Correct Answer - D 1) The mechanism used by msot mammals to regulate their body temperature are similar to the ones that humans use. 2) Human maintain a constant body temperature of `37^(@)C(98.6^(@)F)`. 3) In summer body temperature is maintained by sweating. 4) Plants do not have any mechanism to maintain internal temperature. |
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| 363. |
A J-shaped growth curve depictsA. Exponential growth when conditions are limitedB. Exponential growth when conditions are unlimitedC. Logistic growth when conditions are limitedD. Logistic growt when conditions are unlimited |
| Answer» Correct Answer - B | |
| 364. |
Give right answer of the following: (a) Number of births during a given period in the population that are added to initial density : 1 (b) Number of deaths in the populations in a given period: 2 (c) Number of individuals of the same species that have come into the habitat from elsewhere during a given time period: 3 (d) Number of individuals who left habitat and gone elsewhere during a given time period: 4A. 1`-`mortality, 2`-`natality, 3`-`emigration, 4`-`immigrationB. 1`-`mortality, 2`-`natality, 4`-`emigration, 3`-`immigrationC. 2`-`mortality, 1`-`natality, 3`-`emigration, 4`-`immigrationD. 2`-`mortality, 1`-`natality, 4`-`emigration, 3`-`immigration |
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Answer» Correct Answer - D 1) Whatever might be the ultimate reason, the density of a population in a given habitat during a given period flucuates due to change in four basic process. 1) Natality, 2) Mortality, 3) Immigration and 4) Emigration. 2) Two of three processes (natality and immigration) contribute an increase in population density and two of which (mortality and emigration) to a decrease. 1) Natality [B]: Number of births during a given period in the population that are added to inital density. 2) Mortality [D]: Number of deaths in teh population in a given period. 3) Immigration [I]: Number of individuals of the same species that have come into the habitat, from elsewhere during a given tiem period. 4) Emigration [E]: Number of individuals who left habitat and gone elesewhere during a given time period. |
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| 365. |
Coamouflage is an important mechanism whereA. Predators are never cryptically coloured for easy capturing of their preyB. Prey species are crytically coloured to avoid being detected easily by the predatorC. Prey prduces are cryptically poisonous chemicals in their sorroundings to protect themselves from predatorsD. Predators evolved some physiological adaptations to reach to the prey present in some harsh habitats |
| Answer» Correct Answer - B | |
| 366. |
Under normal conditions, the most important factors influencing population density areA. B and DB. E and IC. B, D and ID. B, D, E and I |
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Answer» Correct Answer - A Under normal conditions, the most important factors influencing population density are B(birth) and D(death). |
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| 367. |
During competitionA. Both species are benefittedB. Both species are harmedC. One species is benefitted and other is harmedD. Neither of the species are harmed or benefitted |
| Answer» Correct Answer - B | |
| 368. |
Which one provide the evidence for the occurrence of competition in nature?A. Resource partioningB. Competitive releaseC. MacArthur experimentD. All of the above |
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Answer» Correct Answer - B Competitive release provide the evidence for the occurrences of competition in nature. |
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| 369. |
A species whose distribution is restricted to a smal geographical area because of the presence of a competitively superior species, is found to expand its distributional range dramatically when the competing species is experimentally removed. This is the observation ofA. Resource partitioningB. Competitive releaseC. Interference competitionD. Competitive exclusion |
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Answer» Correct Answer - B A species whose distribution is restricted to a small geographical area because of the presence of a competitvely area because of the presence of a competitively superior species, is found to explain its distributional range dramatically when the competing species is experimentally removed. This the observation of competitive release. |
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| 370. |
Solar cnstant is __________ cal `cm^(2)`/mm.A. 2B. 4C. 6D. 8 |
| Answer» Correct Answer - A | |
| 371. |
Who determine to a large extent geographical distribution of different species?A. Regional and local variationsB. Physico-chemical componentsC. The level of thermal toleranceD. All of the above |
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Answer» Correct Answer - C The levels of thermal tolerance determine to a large extent geographical distribution of different species. |
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| 372. |
Age distribution is the characteristic ofA. OrganismB. PopulationC. CommunityD. Ecosystem |
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Answer» Correct Answer - B Age distribution is the characteristic of population. |
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| 373. |
Fill in the blanks : `………` is the natural ability of a population to increase at its maximum rate under ideal conditions. However , sum of factors called `……….` prevent a population from reproducing at its maximum rate . |
| Answer» Correct Answer - Biotic potential , Environmenta resistance | |
| 374. |
Fill in the blanks: a. Next to temperature,..1.. Is the most important factor influencing the life or organisms. b. Life on earth originated in ..2..and iis unsustainable without ..2.. c. The productivity and distribution of ..3..is heavily dependent on water. d. For aquatic organisms the ..4..of water becomes important.A. 1`-`light, 2`-`water, 3`-`animals, 4`-`quantityB. 1`-`water, 2`-`air, 3`-`plants, 4`-`qualityC. 1`-`soil, 2`-`water, 3`-`animals, 4`-`quantityD. 1`-`water, 2`-`water, 3`-`plants, 4`-`quality |
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Answer» Correct Answer - D a) Next to temperature, water is the major important factor influencing the life of organisms. b) Life on earth originated in water and is unsustainbly without water. c) The productivity and distribution of plants is heavily dependent on water. d) For aquatic organism the quality (pH and chemical composition) of water becomes important. |
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| 375. |
Which of the following is correct?A. Population change =(Birth + Immigration) - (death + emigration)B. Population change =(Birth + emigration) + (death + emigration)C. Population change =(Birth + emigration) + (death -immigration)D. Population change =(Birth - immigration)-(death + emigration) |
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Answer» Correct Answer - A Population change = (birth + immigration)-(death + emigration). |
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| 376. |
Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to:A. Keolado National ParkB. Western GhatC. MeghalayaD. Corbett National Park |
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Answer» Correct Answer - A Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to Keolado National Park. |
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| 377. |
List any four characters that are employed in human population census. |
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Answer» A population has the following characterstics that are employed in human population census. (i) Natality and mortality (ii) Sex ratio (iii) Population density (iv) Age distribution (v) Population growth |
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| 378. |
Habitat includesA. Biotic componentsB. Abitoic componentsC. Pathogens, predators, parasites and competitorsD. All of the above |
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Answer» Correct Answer - D Habitat includes biotic (pathogens, predators, parasiitess and competitors) and abiotic components. |
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| 379. |
How many insects are know to be phytophagus?A. 0.25B. 0.5C. 0.32D. 0.18 |
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Answer» Correct Answer - A Nearly, `25%` insects are known to be phytophagous (feeding on plant sap and other parts of plants.). |
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| 380. |
The life cycles of parasites are often complex , involving one or two intermediate hosts or vectors to facilitate parasitisation of its primary hosts. (True/False) |
| Answer» Correct Answer - True | |
| 381. |
Eichhornia crassipes isA. xerophyteB. hydrophyteC. mesophyteD. paraslte |
| Answer» Correct Answer - B | |
| 382. |
When resources are unlimited each species has the ability to realise fully its innate potential to grow in number as observed byA. Lamark while developing his theory of use and disuse of organsB. Hugo de Vries while developing his theory of mutationC. Darwin while developing his theory of natural selectionD. All of the above |
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Answer» Correct Answer - C When resources are unlimited each species has the ability to realise fully its innate potential to grow in number as observed by Darwin while developing his theory of natural selection. |
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| 383. |
What are the organisms that feed on plant sap and other plant parts called? |
| Answer» The organism that feed on plant sap and other parts of plants are termed as phytophagous. | |
| 384. |
Assertion: Under unlimited resource conditions, popultion can show an exponential growth curve. Reason: The maximum possible number of individuals can aloways be supported when enough resources are available.A. If both Assertion and Reason are true and the reason is correct explanation of the assertion, then mark (1).B. If both Assertion and Reason are true but the reason are true the reason is not the correct explanation of the assertion, then mark (2).C. If Assertion is true but Reason is false, then mark (3).D. If both Assertion and Reason are false, then mark (4). |
| Answer» Correct Answer - B | |
| 385. |
What would be the growth rate pattern, when the resources are unlimited? |
| Answer» In case of unlimited resources, the pattern of growth rate is exponential. | |
| 386. |
In the case of peppered moth (Biston betularia) the black-coloured from became dominant over the light-coloured form in England during industrial revolution. This is an example ofA. Inheritance of darker colour character acquired due to the darker environmentB. Natural selection whereby the darker forms were selected.C. Appearance of the darker coloured individuals due to very poor sunlightD. Protective mimicry |
| Answer» Correct Answer - B | |
| 387. |
A : Antarctic fishes have blubber to withstand sub zero temperatures. R: Blubber are proteins which allow the freezing of body fluids.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertionB. It both Assertion & Reason are true but the reason is not the correct explanation of the assertionC. If Assertion is true statement but Reason is falseD. If both Assertion and Reason are false statements |
| Answer» Correct Answer - D | |
| 388. |
A: Cattle or goat never graze on Calotropis. R: Thorms are present as a morphological means of defence.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertionB. It both Assertion & Reason are true but the reason is not the correct explanation of the assertionC. If Assertion is true statement but Reason is falseD. If both Assertion and Reason are false statements |
| Answer» Correct Answer - C | |
| 389. |
Below is the diagramatic represetation of response of organisms against temperature . Find out the correct match A. A-plants , B-birdsB. A-birds, B-mammalsC. C-mammals, B-plantsD. A-birds, B-plants |
| Answer» Correct Answer - A | |
| 390. |
Assertion: For aquatic orgaisms the qality (chemical composition and pH) of water becomes important. Reason: Many freshwater of light on land is closely linked with that of temperature.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - B a) For aquatic organisms the quality(chemical composition and pH) of water becomes important. b) Many freshwater animals cannot live long for sea water and vice versa because of the osmotic problems. |
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| 391. |
Assertion: The availability of light on land is closely linked with that of temperature. Reason: Sun is the source for both light and temperature.A. If both assertion and reason are true and the reason is the correct explanation of the assertion.B. If both assertion and reason are true but reason is not the correct explanation of the assertion.C. If assertion is true but reason is false.D. If both assertion and reason are false. |
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Answer» Correct Answer - A The availability of light on land is closely linked with that of temperature because sunis the source for both light and temperature. |
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| 392. |
Which one of the following is a qualitative character?A. DispersionB. Life formsC. Growth formsD. Diversity |
| Answer» Correct Answer - D | |
| 393. |
Nearly all plants and an overwhelming majority (99 percent) of animals are categorised as )A. Conformers-They can maintain a constant internal environmentB. Conformers-They cannot maintain a contant internal environmentC. Regulations -They can maintain a constant internal environmentD. Regulations -They cannot maintain a constant internal environment |
| Answer» Correct Answer - B | |
| 394. |
Who formulated the first postgraduate course of ecology in India?A. P.MaheshwariB. Ramdeo MisraC. G.N.RamchandranD. K.Esau |
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Answer» Correct Answer - B Ramdev Misra formulated the first postgraduate course of ecology in India. |
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| 395. |
Per cent individuals of a given age or age group is calledA. Age distributionB. Age pyramidC. Sex ratioD. Both A and C |
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Answer» Correct Answer - A Per cent individuals of a given age or age group is called age distribution. |
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| 396. |
Of all the species of insects known, nearly 70-80% are found inA. Tropical savannahB. ChapparalC. Tropical rain forestsD. Deciduous forests |
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Answer» Correct Answer - C Off all the species of insects known, nearly 70-80% are found in tropical rain forest. |
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| 397. |
Find out the correct match w.r.t. salinity (in parts per thousand)A. In land water = `gt 5`B. Sea water =60-65C. Hyper saline logoons = `gt 100`D. Fresh water `= gt 3` |
| Answer» Correct Answer - C | |
| 398. |
Two most important factors influencing the life of organisms areA. soil, temperatureB. Light, waterC. Water, temperatureD. Soil, light |
| Answer» Correct Answer - C | |
| 399. |
The change in population size at a given time interval t , is given by the expression `N_(t) = N_(0) + B + I - D- E` I , B and D stand respectively forA. a rate of immigration , mortality rate, natality rateB. rate of emigration , natality rate , mortality rateC. mortality rate , rate of immigration , natality rateD. rate of immigration , natality rate , mortality rate |
| Answer» Correct Answer - D | |
| 400. |
Mutualism and protocooperation areA. positive interactionsB. negative interactionsC. NeutralD. Both (a) and (b) |
| Answer» Correct Answer - A | |