InterviewSolution
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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.
| 401. |
Observe the set of 4 figures A, B, C and D and answer the following questions. I. Which one of the figures shows mutualism? II. What kind of association is shown in D? III. Name the organisms and the association in C. IV. What role is the insect performing in B? |
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Answer» I. Figure A show a pollinator (bee) on a flower. The association between pollinator insect and plant is termed as mutulalism. II. Predation. III. Egrets and grazing cattle is good example of commensalism. IV. Scavenging-The insect is playing the role of an scavenger. |
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| 402. |
Which of the following shows mutualism?A. Fig and waspB. Orchid growing on mango branchC. Clown fish and Sea AnemoneD. Barnacle growing on back of whale |
| Answer» Correct Answer - A | |
| 403. |
Rise in the temperature and air humidity can be observed fromA. Equator towards polar regionB. Poles to equator region during latitudinal transitionC. Plains to mountain top during altitudinal movementD. More than one option is correct |
| Answer» Correct Answer - B | |
| 404. |
A process which maintains constancy of internal body environment of organisms despite varying external environment conditions is called asA. HomeostasisB. EpistasisC. HeterosisD. Antibiosis |
| Answer» Correct Answer - A | |
| 405. |
Which of the following shows biological antagonism or allelopathy?A. AmensalismB. Proto-cooperationC. CompetitionD. Parasitism |
| Answer» Correct Answer - A | |
| 406. |
Assertion : Allelopathy is a form of ammensalism that occurs in plants . Reason : Association of rooting plants with fungal hyphae is an important example ammensalism .A. If both A and R are true and R is the correct explanation of A .B. If both A and R are true but R is not the correct explanation of A .C. If A is true but R is false .D. If both A and R are are false . |
| Answer» Correct Answer - C | |
| 407. |
The external appearance of a biological community is calledA. physiognomyB. startificationC. patternD. phenology |
| Answer» Correct Answer - A | |
| 408. |
What is the importance of light for animals ? |
| Answer» Many animals use the diurnal and seasonal variation in light intensity and duration as cues for timing their foraging pattern, reproductive and migratory activities. | |
| 409. |
Roots of higher plants develop mycorrhiza for obtainingA. SulphatesB. NitrogenC. PhosphatesD. All of the above. |
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Answer» Correct Answer - D Roots of higher plant develop mycorrhiza for obtaining sulphates, nitrogen and phosphates. |
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| 410. |
Competition is a rivalry between two or more organisms for obtaining the same resources. It is a type ofA. Positive interactionB. Negative interactionC. Neither positive nor negative intractionD. Symbiotic relationship |
| Answer» Correct Answer - B | |
| 411. |
On the basis of temperature tolerance organisms are classified into two categories. Amongst these majority of organisms belong to which category ? |
| Answer» Correct Answer - Stenothermal | |
| 412. |
Consider the following statements regarding stratosphere . I. It begins at the top of the tropopause. II. It includes much of ozone layer. III. It is nearest to the earth. IV. This zone is above 80 km atitude. Choose the incorrect statementA. II and IIIB. I and IIC. I and IIID. III and IV |
| Answer» Correct Answer - D | |
| 413. |
Give the formula for the change in population size . |
| Answer» Change in population size = (birth + immigration ) - (death + emigration) . | |
| 414. |
Hibernation occuring in certain animalsA. OccasionalB. IntermittentC. RhythmicD. Periodic |
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Answer» Correct Answer - D Hibernation and aestivation are periodic phenomenon |
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| 415. |
Write the basis on which an organism occupies a space in its community/natural surroundings. |
| Answer» A niche may be described in term of space an organism occupies in its community or natural surroundings . | |
| 416. |
Give one example for each of the following I. Eurythermal plant species…….. II. A hot water spring organism………… III. An organism seen in deep ocean trenches………. IV. An organism seen in compost pit………… V. A parasitic angiosperm............. VI. A stenothermal plant species............... VII. Soil organism............ VIII. A benthic animal.......... IX. Antifreeze compound seen in antarctic fish............. |
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Answer» III. Jelly fishes IV. Earthworm V. Cuscuta VI. Earthworm V. Cuscuta VI. Cocos nucifera VII. Bacteria VIII. Octopus IX Salt content (osmotic regulation) |
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| 417. |
What is diapause and its significance ? |
| Answer» It is a stage of suspended development that some organisms like zooplanktons in lakes and ponds, adopt to survive under unfavourable conditions. | |
| 418. |
Annual migration does not occur in case ofA. arctic ternB. salmonC. siberian craneD. salamander |
| Answer» Correct Answer - D | |
| 419. |
Annual migration does not occur in case ofA. Arc TernB. SalamanderC. SalmonD. Siberian Crane |
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Answer» Correct Answer - B Annual migration does not occur in case of salamander. |
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| 420. |
Annual migration does not occur in the case ofA. SalmonB. Siberian craneC. SalamanderD. Arctic tern |
| Answer» Correct Answer - C | |
| 421. |
Organisms occupying similar ecological niche but different geographical areas of distribution are called asA. Edge speciesB. Ecological equivalentsC. EcocolinesD. Inquilines |
| Answer» Correct Answer - B | |
| 422. |
What does the sigmoid growth curve of a population mean ? |
| Answer» Rapid multiplication and then stabilization of population. | |
| 423. |
Which of the following statement is correct ?A. Two species within a given community can have exactly the same nicheB. Two species within a given community cannot have exactly the same nicheC. Two species ca live permanently togetherrD. Both (2) & (3) |
| Answer» Correct Answer - D | |
| 424. |
The taiga region is also known asA. Deciduous forestB. Tropical rain forestC. Northern conifer forestD. Torpical savannah |
| Answer» Correct Answer - C | |
| 425. |
Population density is represented byA. N/sB. N/tC. t/sD. `Delta N_(n)//Delta t` |
| Answer» Correct Answer - A | |
| 426. |
Place occupied by an organism in relation to environment isA. HabitB. HabitatC. EdaphicD. Niche |
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Answer» Correct Answer - B Place occupied by an organism in relation to environment is habitat. |
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| 427. |
Salt concentration (salinity) of the sea measured in parts per thousand isA. `10 - 15`B. `30 - 70`C. `0 - 5`D. `30 - 35` |
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Answer» Correct Answer - D Next to temprature water is an important abiotic component influencing the life of an organism/organisms. In an oceanic ecosystem, the organisms face water related problems like pH, salinity of water. The salt concentration (salinity) of sea measured in parts per thousand is 30 - 35. The other three options are incorrect. |
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| 428. |
Ecotone isA. a polluted areaB. the bottom of a lakeC. a zone of transition between two com- munitiesD. a zone of developing community |
| Answer» Correct Answer - c | |
| 429. |
The phenomenon of having higher number of species in ecotone is calledA. edge effectB. abundanceC. frequencyD. dominance effect |
| Answer» Correct Answer - A | |
| 430. |
Species found exclusively in ecotone are calledA. morphospeciesB. edges speciesC. allopatric speciesD. sympatric species |
| Answer» Correct Answer - B | |
| 431. |
Density of population D isA. S(size)/W (weight)B. S(space)/N (number)C. N(number)/S (space)D. S(space)/W(weight) |
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Answer» Correct Answer - C D=N (number)/S (space). |
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| 432. |
Match the items given in column I with appropriate items (one or more ) of column II . `{:("Column" I , , "Column" II),((i)"Cacti" ,, (a) "Sciophytes") , ((ii) "Shade loving plants" ,, (b) "Plants growing in saline environment "), ((iii) "Halophytes" ,, (c) "Monarch butterfly and queen monarch"), ((iv) "Batesian mimicry" ,, (d) "Bats") , ((v) "Mullerian mimicry" ,, (e) "Monarch butterfly , viceroy butterfly" ), ((vi) "Echolocation" ,, (f) "Xerophyters"), (,, (g) "Avicennia"):}` |
| Answer» Correct Answer - (i) f (ii) a (iii) b , g (iv) e (v) a (vi) d | |
| 433. |
Fill in the blanks : Intraspecific interactions are of two types . These may be `……..` or `………` . |
| Answer» Correct Answer - Co-operating (in any order ) . | |
| 434. |
Although total number is generally the most appropriate measure of population density, it is in some cases either meaningless or difficult to determine as in the case ofA. A density laboratory culture of bacteria in a petri dishB. Comparison of population density of 200 Parthenium plants and a single hyge-banyan tree with a large canopyC. Tiger censusD. Both A and B |
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Answer» Correct Answer - D In an area if there are 200 Parthenium plants but only a single Banyan tree with a large canopy, stating that the population density of Banyan is low relative to that of Parthenium amounts to under estimating the enormous role of Banyan in that community. In such cases percent cover or biomass is more meaningful measure of the population size. |
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| 435. |
The population density can be measured inA. NumberB. Biomass and per cent coverC. Relative densitiesD. All of the above |
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Answer» Correct Answer - D The population density can be measured in number, biomass, per cent cover and relative densities. |
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| 436. |
Non-living components of the environment including soil, water, air, light, nutrients, etc., are called:A. biotic factorsB. abiotic factorsC. limiting factorD. ecological factor |
| Answer» Correct Answer - B | |
| 437. |
The transition zone between two communities is calledA. EcoclineB. EcotoneC. Buffer zoneD. Thermocline |
| Answer» Correct Answer - B | |
| 438. |
Sigmoid/logistic growth curve is represented byA. dN/dt = rNB. dN/dt = r N(1 - N/K)C. Nt = No + B + I - D - ED. dN/dt = 1 - N/K |
| Answer» Correct Answer - B | |
| 439. |
Main characterstic of halphytes isA. Sunken stomataB. ViviparyC. HeterophyllyD. All of the above. |
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Answer» Correct Answer - B Main characteristic of halohytes is vivipary. |
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| 440. |
Sigmoid/logistic growth curve is represented byA. `(dN)/(dt) =rN`B. `(dN)/(dt)=rN(1-N//k)`C. `N_(t)=N_(0)+B+I-D-E`D. `(dN)/(dt) = 1-N/K` |
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Answer» Correct Answer - B Sigmoid/logistic growth curve is represented by `(dN)/(dt)= rN(1-N//k)`. |
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| 441. |
Which of the following is an intraspecific interaction?A. AmensalismB. CommensalismC. SymbiosisD. Cannibalism |
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Answer» Correct Answer - D Interactions between the individuals are of two types: intraspecific and interspecific. i) Intraspecific interaction: Interaction between the individuals of same species is known as intraspecific interaction. E.g.: Cannibalism. 2) Interspecific interaction: Interspecific interaction arises from the interaction of population of two different species. They could be beneficial, detrimental or neural (neither harm nor benefitted) to one of the species or both. |
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| 442. |
The most appropriate measure of population density is generallyA. NumberB. BiomassC. Per cent coverD. All of the above |
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Answer» Correct Answer - A The most apporopriate measure of population density is generally number. |
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| 443. |
Territory is defended againstA. PredatorB. Any intruderC. Intruder of another speciesD. Intruder of the same species |
| Answer» Correct Answer - D | |
| 444. |
The inability of different organisms to interbreed is calledA. SterilityB. ParasitismC. Reproductive isolationD. Monogamy |
| Answer» Correct Answer - C | |
| 445. |
Boundary of territory is marked byA. urinationB. presence of excretaC. pheromones present in excretaD. All of the above |
| Answer» Correct Answer - D | |
| 446. |
The population size is more technically calledA. Population gradientB. Population censusC. Population pressureD. Population density |
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Answer» Correct Answer - D The population size in more technically called population density. |
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| 447. |
If feeding efficiency of one species might be reduced due to the interfering and inhibitory presence of the other species, even if resources (food and space) are abundant then it is calledA. Resource partitioningB. Competive releaseC. Interference competitionD. Competitive exclusion |
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Answer» Correct Answer - C If feeding efficiency of one species might be reduced due to the interfering and inhibitory presence of the other species, even in resources (food and space) are abundant then it is called interference competiton. |
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| 448. |
The factor related to structure of earth surface isA. edaphicB. bioticC. temperatureD. topographic |
| Answer» Correct Answer - A | |
| 449. |
Which statement is false about predators?A. Predators keep prey population under controlB. Predators help in maintaining species diversity in a communityC. If a predator is not efficient, the prey population will become extinctD. Tiger is an example of predator |
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Answer» Correct Answer - C if a predator is too efficient and overexploits its prey, then the prey might become extinct and following it the predator will also become extinct for the lack of food. This is the reason why predator in nature are prudent. |
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| 450. |
A group of animals of a species that live in a well-defined geographical area, share or compete for similar resources, potentially interbreed and thus constitute aA. CommunityB. PopulationC. BiomeD. Ecosystem |
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Answer» Correct Answer - B A group of animals of a species that live in a well defined geographically area, share or compete for similar resources, potentially interbreed and thus constitute a population. |
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