InterviewSolution
Saved Bookmarks
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.
| 551. |
Assertion (A) : Animals adopt different strategies to survive in hostile environment. Reason (R ) : Praying mantis is green in colour which merges with plant foliage.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 - B | |
| 552. |
Praying mantis is a good example of :A. camouflageB. mimicryC. colourationD. Warning colouration |
| Answer» Correct Answer - A | |
| 553. |
Animals have innate ability to escpae from predation. Select the incorrect example.A. Colour change in ChameleonB. Enlargement of body by swallowing air in Puffer fishC. Poison fangs of snakesD. Melanin in moths |
| Answer» Correct Answer - C | |
| 554. |
Which is appropriately defined?A. Host is an organism which provides food to another organism.B. Amensalism is relationship in wich one species is benefitted while the other is unaffected.C. Predator is an organism that catches and kills other organisms for food.D. Predator is an organism which always liver inside the body of other organism and may kill it. |
| Answer» Correct Answer - C | |
| 555. |
Which of the following are likely to be present in deep sea water?A. EubacteriaB. Blue-greeen algaeC. Saprophytic fungiD. Archaebacteria |
| Answer» Correct Answer - D | |
| 556. |
List any two adaptive features evolved in parasites enabling them to live successfully on their hosts . |
| Answer» (i) Most parasites develop some clinging structure . (ii) They lay large number of eggs . | |
| 557. |
Mention any two significant roles predation plays in nature. |
|
Answer» (i) Predation transfers energy from plants to higher trophic level . (ii) Predation keeps prey population under control . |
|
| 558. |
When and why do same animals like snails go into aestivation ? |
| Answer» Snails and other such animals go into aestivation during summer to avoid heat of summer . | |
| 559. |
Why are decomposers essential in nature ? |
| Answer» Bacteria , fungi and actinomycetes act as decomposes to decompose dead bodies of plants and animals and their wastes to release locked in inorganic materials for their recycling in the environment . Therefore , decomposers are essential in nature . | |
| 560. |
A livewort plant in unable to complete its life cycle in a dry environmental . State two reasons. |
|
Answer» (i) It needs water for the transfer of male gametes to the non-motile female gamete for fertilization . (ii) Its spores need sufficient moisture for germination . |
|
| 561. |
Which of the following would necessarily decrease the density of a population in a given habitat ?A. Natality `gt` mortalityB. Immigration `gt` emigrationC. Mortality and emigrationD. Natality and immigration |
|
Answer» Correct Answer - C Population growth means increase in its size and is determined by addition and loss of individual in a population . Population density is the number of individuals present per unit volume/area at given time. Thus, mortality and emigration would necessarily decrease the density of a population in a given habitat due to loss of individual result from mortality (deaths) and emigraiton. When natality rate will be more than mortality rate and increased immigration rate mould necessarily increase the density of a population. |
|
| 562. |
Which character is not present in the hydrophytes?A. Poor rootsB. Plentiful xylem and sclerenchymaC. Leaves with stomata on the upper surface or absentD. Abundant aerenchyma |
| Answer» Correct Answer - B | |
| 563. |
Categorise the following plants into hydrophytes, halophytes, mesophytes and xerophytes. Give reasons for your answers. (a) Salvinia (b) Opuntia`(c)`Rhizophora (d) Mangifera |
| Answer» (a) Hydrophyte (b) Xerophytes (c) Halophytes (d) Mesophytes . | |
| 564. |
Which one of the following is a well-developed tissue present in hydrophytes?A. AerenchymaB. CollenchymaC. StomataD. Root system |
| Answer» Correct Answer - A | |
| 565. |
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following `{:((a),"Bacteria",,.........),((b),"Banyan",,.........),((c),"Deer",,.........),((d),"Fish",,.........):}` |
| Answer» (a) Numbers/unit vol. (b) Boimess/unit area (c) Numbers/unit area (d) Weight/unit area. | |
| 566. |
In a pond , we see plants which are free-floating , rooted-submerged , rooted emergent , rooted with floating leaves . Write the type of plants against each of them . `{:("Plant Name" ,, "Type" ) , ((a) "Hydrilla" ,, "________"), ((b) "Typha" ,, "______"), ((c) "Nymphaea" ,, "______") , ((d) "Lemna" ,, "_______") , ((e) "Vallisnaria" ,, "_______") :}` |
| Answer» (a) Submerged (b) Rooted emergent (c) Rooted with floating leaves (d) free-floating (e) Rooted- submerged . | |
| 567. |
Submerged hydrophytes have a well developedA. vascular systemB. aerenchymaC. root systemD. stomatal system |
| Answer» Correct Answer - B | |
| 568. |
Write adaptation of submerged , rooted hydrophytes . |
| Answer» To withstand movement of water , submerged , rooted hydrophytes have ribbon-shaped or greatly dissected leaves . The stems are soft are soft , spongy and with long internodes . | |
| 569. |
Assertion: Presence of pneumatophores is a special adaptation of hydrophytes. Reason: Pneumatophores are positively geotropic shoots that have lenticels and help in gaseous exchange.A. If both assertion and reason are true and the reason is a correct explanation of the assertion.B. If both assertion and reason are true but reason is not a correct explanation of the assertion.C. If the assertion is true but reason is false.D. If both the assertion and reason are false. |
| Answer» Correct Answer - D | |
| 570. |
What will happen to a well growing herbaceous plant in the forest if it is transplanted outside the forest in a park?A. It will grow normallyB. It will grow well because it is planted in the same locality ?C. It may not survive because of change in its micro climateD. It grows very well because the plant gets more sunlight |
| Answer» Correct Answer - C | |
| 571. |
Ecology at the organismic level is essentiallyA. Physiological ecologyB. Morphological ecologyC. Behavioural ecologyD. Anatomical energy |
|
Answer» Correct Answer - A Ecology at the "organism level" is essentially physiological ecology, which tries to understand that different organism are adapted to their environment in terms of not only survival but also reproduction. |
|
| 572. |
Cuckoo and crow are examples ofA. CompetitionB. EctoparasitesC. Brood parasitismD. Predation |
| Answer» Correct Answer - C | |
| 573. |
Predation performs all, exceptA. Transfer of energyB. Keeps prey populations under controlC. Loss of sence organsD. maintains species diversity |
| Answer» Correct Answer - C | |
| 574. |
Which of the following is a conduit for energy transfer across trophic levels ?A. MutualismB. ProtocooperationC. parasitismD. Predation |
| Answer» Correct Answer - D | |
| 575. |
Find the correct option (w.r.t. predation)A. VAMB. LichenC. Yucca-PronubaD. Opuntia and Cochineal insect |
| Answer» Correct Answer - D | |
| 576. |
Association of cattle egret and grazing cattle representsA. CommensalismB. ProtocooperationC. MutualismD. Amensalism |
| Answer» Correct Answer - A | |
| 577. |
dN/dt representsA. birth rateB. death rateC. change in population sizeD. carrying capacity |
| Answer» Correct Answer - C | |
| 578. |
If (B + 1) is more than (D + E) than population willA. increaseB. decreaseC. remain sameD. None of these |
| Answer» Correct Answer - A | |
| 579. |
Community isA. Group of independent, interacting populations of same speciesB. Group of independent and interacting populations of same species in specific areaC. Group of independent and interacting populations of different species in a specific areaD. Group of independent and interacting populations of different species |
|
Answer» Correct Answer - C Community is group of independent and interacting population of different species in a specific area. |
|
| 580. |
Assertion : Geneecology is the study of genetic composition and changes in relation to the origin of ecades , ecotypes , new sps. , etc . Reason: Autecology deals with the study of a group of organisms .A. If both Assertion and Reason are true and the Reason is the correct explanation of AssertionB. If both the Assertion and Reason are true, but the Reason is not the correct explanation of AssertionC. If Assertion is true, but the Reason is falseD. If Assertion is false, but the Reason is true |
|
Answer» Correct Answer - C Geonecology is the study of genetic composition and changes in relation to the origin of ecads, ecotypes, new species, etc. Synecology deals with the study of a group of organisms. |
|
| 581. |
Select the correct statement w.r.t. adaptationsA. Desert lizards bask in the sun and absorb heat when their body temperature drops below comfort zoneB. To stop experiencing altitude sickness, the body compensates low oxygen availability by increasing binding affinity of haemoglobinC. Mammals of colder climate generally have larger ears and limbs to minimise heat lossD. Many desert plants have thin cuticle on their leaf surface and have their stomata arranged on upper surface to minimise water loss. |
| Answer» Correct Answer - A | |
| 582. |
Read the following statements and select the correct option w.r.t. population attributes (a) Population density is necessarily measured in numbers (b) Tiger census is often based on pug marks and fecal pellets (c) Biomass is not a meaningful measure to know population size. (d) Size of a population for any species is not a static parameterA. a & bB. a & dC. c & dD. b & d |
| Answer» Correct Answer - D | |
| 583. |
Under which of the following circumstances, would interspecific competition be most obvious?A. In the presence of a keystone speciesB. When organisms have quite different ecological nichesC. Among species, whose trophic levels are differentD. When a non-native organism is introduced to a community. |
| Answer» Correct Answer - D | |
| 584. |
Mark the correct matchA. Tuna fish-tropical oceanB. Mango-Tropical and arctic treeC. Snow leopard-polar animalD. Both (1) & (3) |
| Answer» Correct Answer - D | |
| 585. |
Select the incorrect statement w.r.t. ecotypesA. They are different from each other on the basis of morphological and physiological charactersB. They are interfertileC. They are genetically similarD. There may be several ecotypes of the same organism |
| Answer» Correct Answer - C | |
| 586. |
Select incorrect statement regarding different population attributesA. Natural selection operates at population levelB. Size of the population tells a lot about its status in the habitatC. In age pyramids age distribution of male and females are shown in separate diagramsD. Population is a group of individuals multiplying by sexual and sexual reproduction |
| Answer» Correct Answer - C | |
| 587. |
Select the incorrect match w.r.t interspecific interactionA. `{:("Species A","Species B", "Interaction"),(+,+,"Mutualism"):}`B. `{:("Species A","Species B", "Interaction"),(+,-,"Parasitism"):}`C. `{:("Species A","Species B", "Interaction"),(+,+,"Commensalism"):}`D. `{:("Species A","Species B", "Interaction"),(+,-,"Predation"):}` |
| Answer» Correct Answer - C | |
| 588. |
A majority of organisms which are restricted to a narrow range of temperature are called as:A. EuryhalineB. StenothermalC. EurythermalD. Stenohaline |
| Answer» Correct Answer - B | |
| 589. |
Next to temperature _______ is the most important factor influencing the life of organisms.A. WindB. SoilC. WaterD. Light |
| Answer» Correct Answer - C | |
| 590. |
Select the incorrect statement.A. Orchid epiphytic on Mango is commensal.B. Bird laying eggs in the nest of the anoterh for incubation shows brood parasitism.C. Most animals and plants maintain a constant internal temperature.D. Small animals are rare in polar regioins |
|
Answer» Correct Answer - C Most animals maintain a constant internal temperature but not the plants. |
|
| 591. |
The plants which can withstand with narrow and broad range of temperature tolerance respectively areA. monothermal and stenothermalB. stenothermal and monothermalC. stenothermal and eurythermalD. stenothermal and mesothermal |
| Answer» Correct Answer - C | |
| 592. |
What type of human population represented by the following age pyramid ? A. Stable populationB. Declining populationC. Expanding populationD. Vanishing population |
|
Answer» Correct Answer - B For human population, the age pyramids show age distribution of males and females in a combined diagram. The shape of the age pyramids reflects the growth status of the population. In a declining population the shape of pyramid is urn-shaped. |
|
| 593. |
The critical minimum and maximum value of an evironmental factor is calledA. Limiting factorB. Law of minimumC. Limits of toleranceD. Carrying capacity |
| Answer» Correct Answer - C | |
| 594. |
The phenomenon of one organism being benefitted with out affecting the other isA. ScavengingB. AmensalismC. CommensalismD. Sumbiosis |
|
Answer» Correct Answer - C The phenomenon of one organism being benefitted without affecting the other is commensalism. |
|
| 595. |
The law of tolerance was given byA. ShelfordB. HaeckelC. J. GrinnelD. Gause |
| Answer» Correct Answer - A | |
| 596. |
Which of the following is correct range of latitudes for temperate region?A. `45^(@)" to "66^(@)`B. `0^(@)" to "20^(@)`C. `20^(@)" to "40^(@)`D. `60^(@)" to "80^(@)` |
|
Answer» Correct Answer - A The zone extends betweeen `45-66^(@)` in southern hemisphere is called temperate zone. |
|
| 597. |
Which of the following is a modified stem for the protection of plants from browsing animals?A. TendrilsB. ThornsC. RhizomeD. Tuber |
| Answer» Correct Answer - A | |
| 598. |
Gause law is related toA. PredationB. ParasitismC. Competitive exclusionD. Coexistence |
|
Answer» Correct Answer - C Gause law is related to competitive exclusion. |
|
| 599. |
There are two ways of exploitation. One way is parasitism, the other one isA. AntibiosisB. CompetitionC. PredationD. Commensalism |
|
Answer» Correct Answer - C There are two ways of exploitation (+,-). One way is parasitism and the other one is predation. |
|
| 600. |
Which aer correct categories with one exception? |
|
Answer» Correct Answer - C Cuscutta is a parasitic plant not a protozoan. |
|