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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. |
Which of the following is resurrection plant ?A. Selaginella lipidophylaB. Gingko bilobaC. Cedrus deodaraD. Sequoia sempervirans |
| Answer» Correct Answer - A | |
| 452. |
Name the alga which is used for obtaining agar. What are the different uses of agar ? |
| Answer» Agar is obtained from the red alga Gelidium. It is a kind of polysaccharide which is widely used as stabiliser of thickener in the preparation of jellies, puddings, creams, bakery goods, etc. It is also used as a temporary preservative for meat and fish in warm regions. Agar is used to make gelatin capsules, as a substance for making dental impressions and as a base for cosmetics. Agar is also used in culture laboratories in the preparation of solid culture media on which bacteria, fungi, and other organisms are grown. | |
| 453. |
What ar the resurrection plants ? Give one example. |
| Answer» These plants show variation under dry and wet conditions. Selaginella- The pteridohite, is a resurrection plant which curls up in a tight ball when dry but uncurls when moistened. | |
| 454. |
Explain the role of chemical information in classification of plants. |
| Answer» The classification based on chemical constituents of plants is known as chemitaxonomy. The chemical which are considered for classificaiton of plants mainly belong to - (i) chemical nature of proteins, (ii) the squencing in DNA, (iii) Presence or absence of particular secondary metabolites, etc. | |
| 455. |
Give the diverse forms of thalli in green algae. |
| Answer» The green algae (chlorophyta) show diverse forms of thalli ranging from unicellular to colonial to filamentous forms. The unicellular form is represented by the flagellated (motile) genera chlamydomonas and non motile genera chlorella. The cells of the colonial form - Volvox are bound together by protoplasmic connections. Filamentous unbranched form is represented by Oedogonium whereas branched filamentous forms are Cladophora, Pithophora and Fritschiella. The marine alga-Ulva, commonly called edible sea lettuce, is pseudoparenchymatous and leaf-like. | |
| 456. |
Write short notes on (a) Numerical taxonomy (b) Chemataxonomy. |
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Answer» (a) Numerical taxonomy. Heywood (1967) defined numerical taxanomy as "the numerical similarities between group of organisms and the ordering of these groups into higher ranking taxa on the basis of these similarities. "It employes collection of data, analysis and meaningful synthesis. Characters of organisms are given equal weight and the relationship of the organisms are numerically determined, usually with the aid of a computer. (b) Chemotaxonomy. The approach of taxanomy in which specific chemicals (micro- and macro-molecules) of organisms are used in classification or as evidences in solving taxonomic probems is called chemotaxonomy. The chemical iformation can be obtained from any part of the plant or animal. The sequencing in DNA and chemical nature of proteins have been utilized to establish similarities and relationships. |
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| 457. |
Write short notes on : (1) Numerical taxonomy (2) cladistic taxonomy. |
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Answer» (1) Nemerical taxonomy. "The numerical evaluation of similarities between groups of organisms and the ordering of these groups into higher ranking taxa on the basis of these similarities, is called numerical taxonomy. It is based on all the observable characters of the organism and to assign them specific number and codes for the computer as plus (+) and minus `(-)` or (-data not available). (2) cladistic taxonomy. Method of classification of organisms beased exclusively on evolutionary relationship is called cladistic taxonomy. |
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| 458. |
Cladistic is a system ofA. CytotaxonomyB. Numerical taxonomyC. Phylogenetic classificationD. Biochemical classification |
| Answer» Correct Answer - C | |
| 459. |
Double fertilizationA. GymnospermsB. AngiospermsC. PteridophytesD. |
| Answer» Correct Answer - C | |
| 460. |
The sporophyte is the dominant phase inA. pteridophytesB. gymnospermsC. AngiospermsD. all of these. |
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Answer» Correct Answer - D In gymnosperms,pteridophytes and angiosperms, the sporophytic phase is dominant. |
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| 461. |
Sex organs are embedded in the thallus inA. MossesB. RicciaC. AzollaD. Fem |
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Answer» Correct Answer - b Sex organs are multicellular, jacketed and embedded in thallus on dorsal side. |
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| 462. |
Pneumatophores occur inA. halophytesB. free - floating hydrophytesC. carnivorous plantsD. submerged hydrophytes |
| Answer» Correct Answer - A | |
| 463. |
Assertion : Agar is used to grow microbes and in preparation of ice-creams and jellies Reason : Agar is a hydrocolloid which is produced by certain marine brown algae.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true and but reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false |
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Answer» Correct Answer - C Agar is used to grow microbes and in preparation of ice-creams and jellies. Agar is not a hydrocolloid. |
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| 464. |
More than one pyrenoid are present inA. UlothrixB. SpirogyraC. OedogoniumD. All the above |
| Answer» Correct Answer - d | |
| 465. |
Dichotomous branching is found inA. LiverwortsB. MossesC. FernsD. Hornworts |
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Answer» Correct Answer - A Dichotomous branching is found in liverworts. |
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| 466. |
Walking fern is named so asA. It walks in forestB. Its spores walksC. It propagates through walkingD. It propagates vegetatively and spreads by leaf tips |
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Answer» Correct Answer - D Walking fern (Adiantum) is named so as its propagates vegetatively and spreads by leaf tips. |
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| 467. |
Name a plant which is commonly called a "walking fern". |
| Answer» Correct Answer - Adiantum. | |
| 468. |
Walking fern is named so asA. it knows walkingB. it is dispersed through walking of animals in forestsC. its spores are able to move with windD. it speads and propagates vegetatively by its leaf tips. |
| Answer» Correct Answer - D | |
| 469. |
The walking fern is so named becauseA. It propagates vagetatively by its leaf tipsB. It knows how to walk by itselfC. Its spores are able to walkD. It is dispersed through the agency of walking animals |
| Answer» Correct Answer - A | |
| 470. |
Heteromorphic alternation of generation is found inA. SpirogyraB. MucorC. SelaginellaD. All of these. |
| Answer» Correct Answer - C | |
| 471. |
Independent alternation of generation is found inA. BryophytaB. PteridophytaC. GymnospermD. Angiosperm |
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Answer» Correct Answer - B Independent alternation of generation is found in pteridophyta. |
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| 472. |
In Dryopteris, kidney shaped soral covering are known asA. IndusiumB. RamentaC. CalyptraD. Annulus |
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Answer» Correct Answer - A In Dryopteris, kidney shaped soral covering are known as indusium. |
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| 473. |
Kidney-shaped covering of Dryopteris isA. RamentumB. PlacentaC. IndusiumD. Sporophyll |
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Answer» Correct Answer - c In Dryopteris true inducium (A specialy developed structure) is present. |
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| 474. |
Spindle shaped male gametes are found inA. LycopodiumB. PterisC. PteridiumD. Selaginella |
| Answer» Correct Answer - D | |
| 475. |
Assertion: stomate are found on the surface of leaves in gymnosperms Reason: In gymnosperms.A. If both assertion and reason are true and reason is the correct explanation of assertion.B. if both assertion and reason are true but reason is not the correct explanation of assertionC. if assertion is true but reason is false.D. if both assertion and reason are false. |
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Answer» Correct Answer - D The leaves in gymnosperms are well-adapted to withstand extreme temperature, humidity and wind. In conifers the needle-like leaves reduce the surface area. Their thick cuticle and sunken stomata help to reduce water loss. |
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| 476. |
Botanical name of Sanjeevani isA. Selaginella chrysocaulosB. Selaginella bryopterisC. Selaginella chrysorhizosD. None of the above |
| Answer» Correct Answer - B | |
| 477. |
Botanical name of Sanjeevani isA. Selaginella utriculariaB. Selaginella bryopterisC. Selaginella crotalariaD. Selaginella botardia |
| Answer» Correct Answer - B | |
| 478. |
Types of leaves that are found in the gymnosperms is/areA. SimpleB. CompoundC. Both A and BD. None of the above |
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Answer» Correct Answer - C There are two type of leaves that are found in the gymnosperms (simple and compound). |
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| 479. |
Select a correct matchA. Chilgoza - Pinus gerardianaB. Canada balsum - EphedraC. Cedra wood oil - CedrusD. Taxol - Ginkgo |
| Answer» Correct Answer - A | |
| 480. |
Needle leaf of conifers is aA. Xerophytic adaptationB. Mesophytic adaptationC. Hydrophytic adaptationD. Halophytic adaptation |
| Answer» Correct Answer - A | |
| 481. |
Which of the following are called botanical snakes ?A. BryophytesB. PteridophytesC. GymnospermsD. Angiosperms |
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Answer» Correct Answer - B Pteridophytes are called botanical snakes. |
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| 482. |
"Botonical snakes" areA. AlgaeB. FungiC. BryophytesD. Pteridophytes |
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Answer» Correct Answer - d Botanical snake: The leaves of "Ophioglossum" pteridohpyte is like hood of black snake cobra. |
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| 483. |
Cyanobacteria is found in association withA. coralloid roots of PinusB. Mycorrhizal roots of PinusC. Coralloid roots of CycasD. Mycorrhizal roots of Cycas |
| Answer» Correct Answer - C | |
| 484. |
Select the incorrect statements with respect to given type of life cycle.A. Maiosis occurs at the time of spore formation in sporophytic plant.B. Gametophytic plant is produced by germination of spores.C. This life cycle is exhibited by most algae and some seeds bearing plants.D. This life cycle is exhibited by many bryophytes and pteridophytes. |
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Answer» Correct Answer - C Given type of life cycle is haplo-diplontic or diplohaplontic life cycle in which haploid gametophytic phase and diploid sporophytic phase alternate with each other. The gametophytic plant (n) produces gametes (n), which fuse to give rise to diploid zygote (2n). zygote grows to form sporophytic plant body (2n). moiosis occurs in the sporophyte at the time of formation of spores and the spores germinate to produce gametophytic plants. bryophytes and pteridophytes exhibit this life cycl patters. algae exhibit haplontic life cycle pattern and gymnosperms and angiosperms follow diplontic life cycle pattern. |
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| 485. |
Cyanobacteria are classified underA. protistaB. plantaeC. moneraD. algae. |
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Answer» Correct Answer - C Cyanobacteria are classified under kingdom monera as they are prokaryotes. They are generaly photosynthetic in nature and contains pigmetns, chlorophyll a, carotenoids, etc. Nostoc and Oscillatoria are examples of this category. |
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| 486. |
Heterosporus always produceA. Monoecious gametophytesB. Dioecious gametophytesC. Homothallic gametophytesD. None of the above |
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Answer» Correct Answer - b Heterosporous pteridophytes (e.g., Isoetes, Selaginella, Marsillea etc.) produce unisexual (dioecious) gametophytes. The development of gametophyte is endosporic (grow within spore wall). |
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| 487. |
First vascular plant isA. ThallophytaB. BryophytaC. PteridophytaD. Spermatophyta |
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Answer» Correct Answer - c Pteriodphytes are first vascular land (tracheophytes) to have independent, sporophyte diploid plant body with true root, stem and leaves. |
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| 488. |
Identify the given structures and select the correction options, A. `{:(L,M,N),("Aplanospore of Ulothrix","Prothallus (2n) of pteridophyte","Ovule of angiosperm"):}`B. `{:(L,M,N),("Palmella stage of Ulothrix","Prothallus (n) of pteridophyte","Ovule of gymnosperm"):}`C. `{:(L,M,N),("Akinetes of Chlamydomonas","Sporophyte (2n) of bryophyte","Endosperm off gymnosperm"):}`D. `{:(L,M,N),("Palmella stage ofchlamydomonas","Prothallus (n)_ of pteridopyte","Ovule of hymnospermsperm"):}` |
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Answer» Correct Answer - D Figure L shows palmella stage in Chlamydomonas. In chlamydomonas, under unfavourable conditions during zoospore formation, the dughter protoplast are not liberated and the parent cell wall gets gelatinised. As a result these protplasts get embedded in the mucilage thus formed. this stage is known as palmella stage. iot helps the zoospore to survive during unfavourable conditions. when the favourable conditon return, the mucilage dissolves and the daugher protoplasts form zoospores. figure M is of gametophytic photocynthetic, independent, formed by germination of spores and bears antheridia and archegonia. figure N represents L.S. of gymnospermic ovule. it shown haploid female gametophyte (or endosperm), bearing archegonia, microphyle, integument, etc. |
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| 489. |
Double fertilisation in an angiospermous plant meansA. Fusion of egg cell with male gameteB. Fusion of secondary nucleus with male gameteC. Both the aboveD. None the above |
| Answer» Correct Answer - C | |
| 490. |
In which of the following double fertillisation occurs ?A. BryophytesB. AngiospermsC. PteridophytesD. Gymnosperms |
| Answer» Correct Answer - B | |
| 491. |
Examine the figure given below and select the right option given all the four parts (a,b,c,d) correctly identified. A. a - Seta b - Sporophyte c - Protonema d - RhizoidsB. a - Antheridiophore b - Male thallus c - Globule d - RootsC. a - Archegoniophore b - Female thallus c - Gemmacup d - RhizoidsD. a - Archegoniophore b - Female thallus c - Bud d - Foot |
| Answer» Correct Answer - C | |
| 492. |
Observe the diagram (A-D) give below and select the right option in which all the four items A-D are correctly identified. A. `{:(A,B,C,D),("Antheridia","Archegonia","Gemma cup","Sphagum"):}`B. `{:(A,B,C,D),("Archegonia","Antheridia","Gemma cup","Sphagnum"):}`C. `{:(A,B,C,D),("Archegonia","Antheridia","Gemma cup","Sphagnum"):}`D. `{:(A,B,C,D),("Gemma cup","Archegonia-phone","Sporophyte","Sphagnum"):}` |
| Answer» Correct Answer - c | |
| 493. |
In angiosperms, double fertillization meansA. Fusion of egg cell with male gameteB. Fusion of secondary nucleus with male gameteC. Both the aboveD. None the above |
| Answer» Correct Answer - C | |
| 494. |
Natural classification system proponents areA. Bentham and HookerB. Hutchinson and TakhtajanC. Linnaeus and AristotleD. Both (1) & (2) |
| Answer» Correct Answer - A | |
| 495. |
In angiosperms pollen germinate on theA. StigmaB. StyleC. AntherD. Ovule |
| Answer» Correct Answer - A | |
| 496. |
Which is most advanced among the following?A. CycadaceaeB. GnetaceaeC. ConiferaeD. Cryptogamae |
| Answer» Correct Answer - B | |
| 497. |
Classification system given by Linnaeus was based onA. Androecium structureB. Flower arrangementC. Leaf morphologyD. Plant habit |
| Answer» Correct Answer - A | |
| 498. |
The sieve tubes and companion cells are exceptional features ofA. GymnospermsB. AngiospermsC. FernsD. Pteridophytes |
| Answer» Correct Answer - B | |
| 499. |
Who is not associated with the artificial system of classification?A. PhylogenyB. OntogenyC. PhycologyD. Mycology |
| Answer» Correct Answer - A | |
| 500. |
Who is not associated with the artificial system of classification?A. PlinyB. TheophrastusC. HutchinsonD. Linnaeus |
| Answer» Correct Answer - C | |