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.
| 301. |
Which group of gymnosperms is close to angiosperms?A. GnetalesB. GinkgoalesC. CycadalesD. Confierales |
| Answer» Correct Answer - A | |
| 302. |
The life cyclic of algae such as Spirogyra isA. HaplonticB. DiplonticC. Haplo-diplonticD. Diplo-haplontic |
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Answer» Correct Answer - A The life cycle of algae such as Spirogyra is haplontic. |
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| 303. |
Assertion: Spirogyra shows haplontic life cycle. Reason: Zygotic meiosis occurs in Spirogyra.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both assertion and reason are true but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - a A life cycle characterized by a haploid thallus, and zygotic meiosis is called haplontic life cycle it is also called as haplobiontic because onl a single type of free living individual is involved in the life cycle. Spirogyra shows haplontic life cycle and therefore, it also shows zygotic nucleus. |
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| 304. |
Sphagum is commonly used as packing matrial for transshipment of living material due to itsA. Capacity to hold waterB. Easy availabilityC. Nature as it can grow anywhereD. All the above |
| Answer» Correct Answer - A | |
| 305. |
discuss different systems of classification briefly. |
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Answer» Different systems of classification proposed from time to timej have been divided into three basic categories viz., artifical system, natural system and phylogenetic systems. (1) Artifical system of classification. Artificial system of classification is based on one or a few superficial resemblences. For example, animals are classified as aquatic (water-dwellers), terrestrial (land-dwellers) and aerial (air-dwellers) according to habitat , as carnivores (flesh-eaters) and herbivores (plant eater) according to the mode of feeding , as oviparous (egg-layers) and viviparous (young-producers) according to the mode of breeding, etc. Similarly, plants are classifed as herbs, shrubs and trees on the basis of their habit. (2) Natural system of classification. Natural system of classification is based on a number of structural and morphological taxonomic charcters. The advocates of natural system of classification are-Michel Adanson, A.L. de Jussieu, A.P. de Candolle, Bentham and Hooker, etc. (3) phylogenetic system of classification. The classification of organism based on their evolutionary interrelationships is called phylogenetic classification. Sir Julian juxely (1940) introduced the term new systematics which includes the modern systems of classification based on specified characters. New systematics includes : Morphotaxonomy (based on structural features), cytotaxonomy (based on cytological studies), chemotaxonomy (based on chemical analysis). Numerical taxonomy (involving quantitative assessment of similarities and dfferences), etc. |
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| 306. |
(a) What is peat ? How is it formed ? (b) What is its economic importance ? |
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Answer» (a) Peat is a compact dark coloured substance, rich in carbon, formed from dead remains of Sphagnum plant parts in acidic marshes which get accumulated year after year, slowly compressed and become hardened due to weight. (b) Peat is dried, cut into pieces and used as fuel. (ii) It is mixed in clayey soil to keep it porous and mixed in sandy soil to improve its water holding capacity. (ii) Many chemical products such as alcohols, ammonium sulphat, peat tar, paraffin, nitrates, brown dye, tanning etc. are obtained from peat. |
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| 307. |
what is a living fossil ? Name any two examples among plants. |
| Answer» An organism which shows long geographical record evidence by its fossils and still growing in living condition, in a limited area is called living fossil. Examples, Ginkgo, Cycas. | |
| 308. |
Bryophytes differ from pteridophytes inA. having mitosporesB. the absence of vascular tissue systemC. lacking embryo stageD. all of the stage |
| Answer» Correct Answer - B | |
| 309. |
Gymnosperms includeA. ShrubsB. Medium sized treesC. Tall treesD. All of the above |
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Answer» Correct Answer - D Gymnosperms include shrubs, medium sized trees and tall tress. |
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| 310. |
Conifers differ from grasses in theA. Production of seeds from ovulesB. Lack of xylem tracheidsC. Absence of pollen tubesD. Formation of endosperm before fertilization. |
| Answer» Correct Answer - D | |
| 311. |
In pteridophytes, pholem is withoutA. Sieve cellsB. Sieve tubesC. Companion cellsD. Bast fibres |
| Answer» Correct Answer - C | |
| 312. |
Independent alternation of generation is found inA. FernB. CycasC. OnionD. Lotus |
| Answer» Correct Answer - A | |
| 313. |
Brown algae are quite common inA. Fresh water habitatsB. Tropical sea waterC. Temperate sea waterD. Both (1) and (2) |
| Answer» Correct Answer - C | |
| 314. |
Vascular cryptogams areA. BryophytaB. PteridophytaC. GymnospermsD. Angiosperms |
| Answer» Correct Answer - B | |
| 315. |
Which is correct statement for UlothrixA. Filamentous alga with flagellated reproductive stagesB. Filamentous alga with nofiagellated reproductive stagesC. Membranous alga producing zoosporesD. Nonmotile colonial alga lacking reproducitve stages |
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Answer» Correct Answer - a Filamentous alga with flagellated reproductive stage represented by gaemetes. |
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| 316. |
Microspores of massulae in Azolla are found inA. lnduciumB. SporangiumC. AntheridiumD. Archegonoum |
| Answer» Correct Answer - B | |
| 317. |
Gametophytic plant body is non-vascular inA. Algae and liverwortsB. Mosses and femsC. Gymnosperms and angiospermsD. All of these |
| Answer» Correct Answer - D | |
| 318. |
Which of the following is present in association with Azolla?A. AnabaenaB. NostocC. ClostridiumD. Azotobacter |
| Answer» Correct Answer - A | |
| 319. |
Match column I with column II and select the correct option from the codes given below `{:("Column I","Column II"),(A." Non-vascular cryptogams",(i)."Gymnosperms,angiosperms"),(B." Vascular cryptogams",(ii)." pteridophytes"),(C." Phanerogams",(iii)." Algae,Bryophytes"):}`A. A-(iii),B-(ii),C-(i)B. A-(ii),B-(i),C-(iii)C. A-(i),B-(ii),C-(iii)D. A-(ii),B-(iii),C-(ii) |
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Answer» Correct Answer - A Cryptogamae refers to paltns without seeds and phanerogamae refersto plants with seeds. Algae and bryophytesare non-vascular crypogams.Pteridophytes are vascular cryptogams. Gymnosperms and angiosperms are phanerogams. |
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| 320. |
In SprirogyraA. The filaments showing scalariform conjugation are homothallicB. The filaments showing lateral conjugation are homothallicC. The filamentes showing lateral conjugation are heterothallicD. Asexual reproduction occurs by zoospores |
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Answer» Correct Answer - b The filament showing lateral conjugation are homothallic because both male and female gametes are found in same filament. |
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| 321. |
Which out of the following are included under tracheophyta, i.e., vascular plants?A. PteridophytesB. GymnospermsC. AngiospermsD. all of these. |
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Answer» Correct Answer - D Tracheophyta are those plants which possess conducting or vascular tissues, xylem and phloem. Xylem transports water and minerals while phloem conducts organic food. Tracheophytes include pteridophytes, gymnosperms and angiosperms. |
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| 322. |
The cell wall of Spirogyra is made up ofA. CelluloseB. PectinC. LigninD. Chitin |
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Answer» Correct Answer - a Each cell of Spirogyra is surrounded by two layered cell wall. Its inner layer is made up of cellulose and outer layer is made up of pectose but quantity of cellulosic substances is high in comparison to pectose. |
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| 323. |
system of classification that employs numerical data to evaluate similarities and differences is known asA. BiosystematicsB. CytotaxonomyC. PheneticsD. Chemotaxonomy |
| Answer» Correct Answer - C | |
| 324. |
system of classification that employs numerical data to evaluate similarties and differences is known asA. cytotaxonomyB. biosystematicsC. pheneticsD. chemotaxonomy |
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Answer» Correct Answer - C Phenetics is a system of classification based on similarity between organisms without regard to their evolutionary relationshipls. In this type of classification the organisms are arranged according to over all similarity of existing organisms based on observable characters. |
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| 325. |
Assertion: Calophyllum leaf has parallel venation. Reason: It is the plant of dicot group of angiosperms.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 the 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. |
| Answer» Correct Answer - B | |
| 326. |
Which of the following is not a dicot ?A. EucalyptusB. SunflowerC. AcaciaD. Banana |
| Answer» Correct Answer - D | |
| 327. |
Cotyledons areA. Modified rootsB. Embryonic leavesC. Known as primary endosperm nucleusD. Present in gymnospermic seeds only |
| Answer» Correct Answer - B | |
| 328. |
Eucalyptus is different from Cedrus in the presence ofA. SyngamyB. SeedsC. ArchegoniaD. Triple fusion |
| Answer» Correct Answer - D | |
| 329. |
Fucus shows which type of life-cycle ?A. HaplonticB. DiplonticC. Haplo-diplonticD. Isomorphic |
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Answer» Correct Answer - B Fucus shows the diplontic life-cylic. |
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| 330. |
Algae which form motile colony isA. VolvoxB. NostocC. SpirogyraD. Chlamydomonas |
| Answer» Correct Answer - a | |
| 331. |
Which of the following is a flagellated algae?A. ChlamydomonasB. UlothrixC. SaccharomycesD. Agaricus |
| Answer» Correct Answer - A | |
| 332. |
Which of the following is coenocytic?A. VaucheriaB. CenturiaC. ChlamydomonasD. Pseudomonas |
| Answer» Correct Answer - A | |
| 333. |
Which of the following is coenocytic?A. VaucheriaB. CentaureaC. ChlamydomonasD. Pseudomonas |
| Answer» Correct Answer - A | |
| 334. |
Alginic acid is obtained fromA. Greem algaeB. Red algaeC. Brown algaeD. BGA |
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Answer» Correct Answer - C Alginic acid/is produced by brown algae. |
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| 335. |
Triphasic life cycle is present inA. Red algaeB. Brown algaeC. DiatomsD. Dinoflagellates |
| Answer» Correct Answer - B | |
| 336. |
Male gametophyte with least number of cells is present inA. PterisB. FunariaC. LiliumD. Pinus |
| Answer» Correct Answer - C | |
| 337. |
Select the wrong statementA. Anisogametes differ either in structure, function or behaviourB. In Oomycetes female gamete is smaller and motile, while male gamete is larger and non - motileC. Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamyD. Isogamy are similar in structure , function and behaviour |
| Answer» Correct Answer - B | |
| 338. |
Which one of the following shows isogamy with non-flagellated gametesA. SargassumB. EctocarpusC. UlothrixD. Spirogyra |
| Answer» Correct Answer - D | |
| 339. |
Mannitol is the stored food inA. CharaB. PorphyraC. FucusD. Gracilaria |
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Answer» Correct Answer - C (c) Fucus belongs to class-Phaeophyceae, in which reserve food is found in form of laminarin, mannitol and oil. Chara belongs to class-Chlorophyceae, in which reserve food is found in form of starch and oil. Porphyra and Gracillaria belongs to class-Thodophyceae, in which reserve food is found in form of floridean starch and Galactan`S_O_(2)` polymers. |
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| 340. |
Which one of the following is wrong about Chara?A. Upper oogonium and lower round antheridiumB. Globule and nucule present on the same plantC. Upper antheridium and lower oogoniumD. Globule is male reproductive structure |
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Answer» Correct Answer - C (c) Both antheridium and oogonium are thhe male and the female reproductive structures respectively. They have sterile jackets on their surface. In Chara globule (antheridium) is present on lower side, while the nucule (oogonium) is present on upper side of sterile vegetative (leaf-like) structure. |
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| 341. |
Which one is a wrong statement?A. Archegonia are found in Bryophyta, Pteridophyta and GymnospermsB. Mucor has biflagellate zoosporesC. Haploid endosperm is typical feature of gymnospermsD. Brown algae have chlorophyll-a and c, and fucoxanthin |
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Answer» Correct Answer - B (b) All the statements are correct except the statement (b). Mucor (fungus) belongs to the class - Zygomycetes. The members of Zygomycetes bear non-motile non-flagellated gametes. |
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| 342. |
Which one of the following is a vascular cryptogam?A. EquisetumB. GinkgoC. MarchantiaD. Cedrus |
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Answer» Correct Answer - A (a) Pteridophytes are also called vascular cryptogams as these have a well developed vascular system but are non-flowering plants. e.g. Equisetum. |
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| 343. |
Agar-agar is commercially obtained formA. green algaeB. blue-green algaeC. brown algaeD. red algae. |
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Answer» Correct Answer - D Agar is gel-like non-nitrogeneous extract obtained from red algae. It is used as a medium in the cultures of bacteria, fungi and other microorganisms and also in numerous industrial processes, e.g., food, bakery, cosmetics, leather, textile industries, in confectionery, etc. |
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| 344. |
Which one of the following shows isogamy with non-flagellated gametesA. UlothrixB. SpirogyraC. SargassumD. Ectocarpus |
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Answer» Correct Answer - b Spirogyra shows isogamy with non-flagellated gametes. |
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| 345. |
Which one of the following is considered important in the development of seed habit?A. Dependent sporophyteB. HeterosporyC. Haplontic life cycleD. Free-living gametophyte |
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Answer» Correct Answer - B (b) Heterospory is the production of spores of two defferent sizes and of two different developmental patterns. It is the most important evolutionary development in the vascular plants because it has ultimately lead to seed development, which is seen in , Selaginella, Salvinia, Azolla, etc. |
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| 346. |
Which one of the following plants is monoecious?A. MarchantiaB. PinusC. CycasD. Papaya |
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Answer» Correct Answer - B (b) Pinus is monoecious as it bear male cone as well as female cone on same tree, (but on separate branches). Marchantia, Cycas and papaya are dioecious plants. |
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| 347. |
Which one of the following is heterosporous?A. DryopterisB. SalviniaC. AdiantumD. Equisetum |
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Answer» Correct Answer - B (b) From the following Salvinia is heterosporous. Heterospory is the production of spores of two different sizes and two different developmental patterns. Small spores are called microspores and larger as megaspore. Microspores germinate to produce the male gametophyte or microgametophyte that bear male sex organs while, megaspore germinates to form female gametophyte or megagametophyte taht bears archegonia or female sex organs . It is most important evolutionary development in the vascular plants because it has ultimately lead to seed development, e.g. Selaginella, Marselia, Salvinia, Azolla, Isoetes. Dryopteris is homosporous and 32-64 haploid spores are produced in each sporangium. Adiantum is also homosporous. The spores are the pioneer structures of the gametophytic generation. |
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| 348. |
Replum is present in the ovary of flower ofA. lemonB. mustardC. sunflowerD. pea |
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Answer» Correct Answer - B (b) The gynoecium in family - Cruciferae (Brassicaceae) is becarpellary, syncarpous, ovary superior, unilocular with pariental placetation. At maturity ovary becomes bilocular due to the formation of false septum (replum), e.g. mustard. In family-Asteraceae (Compositae) the gynoecium is becarpellary syncarpous, ovary inferior, unilocular, one ovulein each locule basal placentation and stigma branched, e.g. sunflower. In family N-Fabaceae (Leguminosae) the gynoecium is monocarpellary, unilocular with superior ovary and marginal placentation, e.g. pea. |
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| 349. |
Pyrenoids are located in theA. NucleusB. NucleolusC. ChloroplastD. Mitochonrin |
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Answer» Correct Answer - C Pyrenoids are located in the chloroplast. |
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| 350. |
Largest flower Raffiesia isA. Total stem parasiteB. Total root parasiteC. Partial stem prasaiteD. Partial root parasite |
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Answer» Correct Answer - b The tip of the root of Raffesia makes haustorial contact with the root of host and absorbs food from the host. |
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