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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.
| 651. |
Small fish sticks to bottom of shark to obtain food crumbs. The association isA. AntibiosisB. PredationC. CommensalismD. Parasitism |
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Answer» Correct Answer - C Small fish sticks to bottom of shark to obtain food crumbs. The association is commensalim. |
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| 652. |
The most well studied bacterial- plant relationship is that ofA. cyanobacterial symbiosis with some aquatic fernsB. gall formation on certain angiosperms by AgrobacteriumC. nodulation of Sesbania stems by nitrogen fixing bacteriaD. plant growth stimulation by phosphate solublising bacteria |
| Answer» Correct Answer - B | |
| 653. |
Why do all the freshwater organisms have contractile vacuoles whereas majority of marine organisms lack them? |
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Answer» Contractile vacuole helps in osmoregulation. Bacause of the cellular environment of a freshwater organism being hypertonic, the water diffuses inside the cell constantly and gets collected in the contractile vacuole, which squeezes the extra water out of the cell periodically. Thus, keeping the internal environment constant. While in case of marine organisms, this does not occur due to high salinity, therefore no need of contractile vacuole. |
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| 654. |
Define heliophytes and sciophytes. Name a plant from your locality that is either heliophyte or sciophyte. |
| Answer» Plants growing well in bright sunlight or favour bright light are called heliophytes or sun plants. While those plants which require low intensity of light or partial shade for growing are termed as shade loving plants or sciophytes. | |
| 655. |
Assertion : Many hydrophytes lack roots . Reason : Roots are used for balancing .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 | |
| 656. |
Assertion : Cold blooded animals do not have fat layer. Reason : Cold blooded animals use their fat for metabolic process during hibemationA. 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 - A | |
| 657. |
The assemblage of all the population of different species that function as an integrated unit through co-evolved metabolic transformation in a specific area is called:A. biomeB. biotic communityC. populationD. ecosystem |
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Answer» Correct Answer - B Biotic community is defined as an assemblage of population that functions as an integrative unit through coevolved metabolic transformation in a prescribed area of physical habitat. |
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| 658. |
Phenomenal and rapid increase of population in a short period is called :A. natural increaseB. population growthC. population explosionD. None of these |
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Answer» Correct Answer - C The tremendous increase in the size and growth of a population in a short period is known as population explosion. |
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| 659. |
Halophytes are organism which areA. fire-resistantB. cold-resistantC. salt-resistantD. sand-loving |
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Answer» Correct Answer - C Warming divided plants, on the basis of soil in which they are found, into the following groups (i) Halophytic plants grow in saline soil, i.e. these plants are salt resistant. (ii) Psammophytes plants grow on sand, i.e. these are adapted to grow into sandy soil. Thus, these are also known as sand-loving plants. (iii) Oxalophytes plants grow in acidic soil. (iv) Lithophytes plants grow on the surface of rocks. (v) Chasmophytes plants grow in the crevices of rocks. |
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| 660. |
The soil, which is transported by wind is known asA. colluvial soilB. eolian soilC. alluvial soilD. glacial soil |
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Answer» Correct Answer - B Depending on the nature of transporting agents, the transported soil may be (i) Glacial - Transportation by glaciers (large mass of snow ice). (ii) Eolian - Transported by wind. (iii) Alluvial - Transported by running water (iv) Colluvial - Transported by gravity. |
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| 661. |
The table below gives the population ( in thousands) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the questions which follow. Which area out of a-d shows maximum species diversity ?A. IIB. IIIC. IVD. I |
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Answer» Correct Answer - C In the given table, the area IV has maximum species diversity, as there are 10 species (A-J) residing in 12 habitats, while in area C, 10 species are residing in 13 habitats So, area III exhibits less diversity than area IV. |
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| 662. |
Permafrost condition is characteristic feature ofA. Hot desert biomeB. Cold desert biomeC. Savanna biomeD. Chaparral biome |
| Answer» Correct Answer - B | |
| 663. |
The typical biome of an area having 25-75 cm of rainfall isA. desertB. grasslandC. deciduous forestD. coniferous forest |
| Answer» Correct Answer - B | |
| 664. |
Plants, which produce characteristic pneumatophores and show vivpary belong toA. halophytesB. psammophytesC. hydrophytesD. mesophytes |
| Answer» Correct Answer - A | |
| 665. |
A biome having a well-developed grass cover interspersed with scattered trees is aA. GrasslandB. SavannahC. DesertD. Temperate forest |
| Answer» Correct Answer - B | |
| 666. |
The grassland vegetation of Africa is known asA. PrairiesB. PampasC. SteppesD. Veldts |
| Answer» Correct Answer - D | |
| 667. |
Which is not a characteristic feature of grassland?A. Extensive root systemB. High productivityC. Periodic fireD. Developed stratification |
| Answer» Correct Answer - D | |
| 668. |
Which one has the maximum biomass?A. Temperature forestB. Tropical rain forestC. Alpine vegetationD. Taiga |
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Answer» Correct Answer - B Tropical rain forests has the maximum biomass. |
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| 669. |
Grassland with scattered trees isA. SavannahB. Deciduous forestC. Evergreen forestD. Tropical rain forest |
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Answer» Correct Answer - A Grasslands with scattered trees is Savannah. |
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| 670. |
Study of inner-relationship between organisms and their environment isA. EcologyB. EcosystemC. PhytogeographyD. Ethology |
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Answer» Correct Answer - A Study of inter-relationship between organism and their environment is ecology. |
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| 671. |
Which of the following is correct for r-selected species ?A. Large number of progeny with small sizeB. Large number of progeny with large sizeC. Small number of progeny with small sizeD. Small number of progeny with large size |
| Answer» Correct Answer - A | |
| 672. |
Mark the incorrect match (w.r.t. population interactions)A. Amensalism :-,0B. Prediation: +,-C. Commensalism : +,+D. Parasitism +,- |
| Answer» Correct Answer - C | |
| 673. |
Which is not correctly matched?A. Laterite`-`Contains aluminiumB. Terra rosa`-`Most suitable for rosesC. Chenozen`-`Richest soilD. Black Cotton Soil`-`Rich in calcium carbonate |
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Answer» Correct Answer - B Terra rosa- Red soil. |
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| 674. |
Which of the following is correctly matched?A. Aerenchyma - OpuntiaB. Age pyramid - BiomeC. Parthenium hysterophorus - Threat to biodiversityD. Stratification - population |
| Answer» Correct Answer - C | |
| 675. |
In which one of the following pairs is the specific characteristic of a soil not correctly matched ?A. Laterite -Contains aluminium compoundB. Terra rosa-Most suitable for rosesC. Chernozems-Richest soil in the worldD. Blank soil-Rich in calcium carbonate |
| Answer» Correct Answer - D | |
| 676. |
A: Holistic approach explains the environmental interactions. R: All environmental factors are integrated with no limits of time and spaceA. 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 | |
| 677. |
According of Darwin, the organic evolution is due toA. Interspecific competitionB. Competition within closely related speciesC. Reduced feeding efficiency in one species due to the presence of interfering speciesD. Intraspecific competition |
| Answer» Correct Answer - A | |
| 678. |
Communities involve interaction of organisms of __________ species in a particular habitat. |
| Answer» Correct Answer - Different | |
| 679. |
sunken stomata occur inA. XerophytesB. HydrophytesC. MesophytesD. Psammophytes |
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Answer» Correct Answer - A Sunken stomata (sotmata arranged in deep pits) occur in Xerophytes. |
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| 680. |
Many species of small plants like _______ growing in forests are adapted to photosynthesize optimally under very low light condition.A. Tree and shrubsB. Herb and shrubsC. Tree and herbsD. Herbs only |
| Answer» Correct Answer - B | |
| 681. |
Genetically adapted population to a particular habitat is called:A. EcadB. EcotypeC. EcoclineD. Ecotone |
| Answer» Correct Answer - B | |
| 682. |
Plants adapted to water scarcity and heat are called ….. . |
| Answer» Correct Answer - Xerophytes . | |
| 683. |
In submergd hydrophytes, the stomata occurA. On the lower surfaceB. On the upper surfaceC. No whereD. On both the surface |
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Answer» Correct Answer - C In submberged hydrophytes the stomata occur no-where, i.e. absent. |
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| 684. |
Plants adapted to grow in sand areA. PsammophytesB. SciophytesC. MesophytesD. Hydrophytes |
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Answer» Correct Answer - A Plants adapted to grow in shade re sciophytes. |
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| 685. |
In 2005, for each of the 14 million people present in a country, `0.028` were born and `0.008` died during the year. Using exponential equation, the number of people present in 2015 is predicted as |
| Answer» Correct Answer - b | |
| 686. |
What is the ecological principle behind the biological control method of managing with pest insects? |
| Answer» Predation is the means of biological control to manage pest insects where predators prey upon pests and regulate their numbers in the habitat. | |
| 687. |
Distinguish between the following: (a) Hibernation and Aestivation (b) Ectotherms and Endotherms |
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Answer» (a) The phenomenon of spending cold period in an inactive stage by an animal is called hibernation . On the other hand , the phenomenon of spending dry-hot period in an inactive stage is called aestivation. (b) Ectotherms are the cold-blooded animals having body temperature matching with the environment temperature . They are affected by temperature variations . Endotherms are warm-blooded animals who can regulate their body temperature by physiological means and maintain more or less constant internal temperature . |
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| 688. |
The principle of competitive exclusion was stated byA. MacArthurB. Verhulst and PearlC. C.DarwinD. G.F.Gause |
| Answer» Correct Answer - D | |
| 689. |
Abundance of a species population within its habitat isA. Absolute densityB. Regional densityC. Relative densityD. Niche density |
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Answer» Correct Answer - D Abundance of a species population withint its habitat is niche density. |
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| 690. |
The modern niche theory was given byA. Pitel kaB. Mac FadyenC. HutchinsonD. All of these |
| Answer» Correct Answer - D | |
| 691. |
Niche of an organism denotesA. habitatB. micorhabitatC. habitat as well as inter-relationsD. habitat as well as climate |
| Answer» Correct Answer - C | |
| 692. |
Water held tightly by soil particles as a thin film over their surface isA. hygroscopic waterB. capillary waterC. chemical waterD. gravitational water |
| Answer» Correct Answer - A | |
| 693. |
Water held tightly by soil particles as a thin film over their surface isA. Hygroscopic waterB. Capillary waterC. Chemical waterD. Gravitatioinal water |
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Answer» Correct Answer - A Soil water: Soil water is of four types 1) Chemically combined water present within soil particle. 2) Hygroscopic water: Water molecules held tightly in form of thin sheet around soil particle is hygroscopic water. 3) Capillary water: Capillary water is present within the intercellular spaces of soil particle. 4) Gravitational water or free water: Water which flows down due to force of gravity is called gravitational water/free water. |
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| 694. |
Match theitems given in column I with those given (one or more ) in column II . `{:("Column" I ,, "Column" II) , ((i) "Crustose lichen" ,, (a) "Commensalim" ) , ((ii) "Interspecific interaction" ,, (b) "Mutualism") , ((iii) "Rhizobium and Leguminous plants" ,, (c) "Pioneer community"), ((iv) "Bombykol" ,, (d) "Parental care ") , ((v) "Intraspecific interaction" ,, (f) "Amensalism" ) ,( ,, (g) "Lithosere"):}` |
| Answer» Correct Answer - (i) c (ii) a , f(iii) b (iv) e (v) d | |
| 695. |
Reduction in vascular tissue, mechanical tissue and cuticle are characteristics ofA. MesophytesB. HydrophytesC. XerophytesD. Epiphytes. |
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Answer» Correct Answer - B Reduction in vascular tissue, mechnical tissue and cuticle are characteristic of hydrophytes. |
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| 696. |
Assertion: Thick cuticle is mostly present in disease resistant plants. Reason: Disease causing agentA. 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 - A | |
| 697. |
Thick cuticle occurs on the leaves of plants belonging toA. cool habitatsB. warm habitatsC. dry habitatsD. wet habitats |
| Answer» Correct Answer - C | |
| 698. |
In a sea shore, the benthic animals live in sandy, muddy and rocky substrate and accordinagly developed the following adaptations. (a) Burrowing (b) Building cubes`(c)`Holdfasts/peduncle Find the suitable substratum against each adaptation. |
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Answer» In a sea shore, water current restrict distribution of organisms. In streamed areas of ocean, animals are strong swimmer or possess attaching organs such as peduncle, or live under stone, in burrows etc. Burrowing animals like tubeworm, building cubes and holdfast or penduncle adaptation are found in sandy, muddy and rocky substratum respectively. |
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| 699. |
A leaf showing a greately thickened plisade layer, thickened cuticle and sotmata located in pits came from a plant that probably lived inA. tropical forestB. lakeC. desertD. mountain top |
| Answer» Correct Answer - C | |
| 700. |
Plants growing near sea shore will usually have xerophyic characters, like thick leaves becauseA. there is plenty of water in the soilB. the concentration of salts is too high for the plants to absorb sufficient water from the soilC. light available to the plants is not sufficientD. the soil is muddy |
| Answer» Correct Answer - B | |