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. |
In Dryopteris, the opening mechanism of sporangium is effectively operated byA. StomiumB. StalkC. PeristomeD. Rhizoids |
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Answer» Correct Answer - A In Dryopteris, the opening mechanism of sporangium is effectively operated by stomium. |
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| 402. |
Asssertion: in pteridophytes, zygote produces a multicellular sporophyte. Reason: Sporophyte is the dominant phase In life cycle of pteridophytes.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 - B In pteridophytes, gametophytes bear male and femal sex organs called antheridia and archegonia, respectively water is required for transfer of antherozoids -the male gametes are released from the antheridia, to the mouth of archegonium.Fusion of male gamete with the egg present in the archegonium results in the formation of zygote. Zygote thereafter produces a multicellular of differentiated sporophyte which is the dominnant phase of the pteridophytes sporophyte which is the dominant phase of the pteridophytes. |
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| 403. |
What is correctA. Protonema of moss and prothallus of Dryopteris are sporophyticB. Protonema of moss and prothallus of Dryopteris are gametophyticC. Moss protonema is sporophytic. Pteris prothallus is gametophytic but plant body of Pteris and Funaria are gametophyticD. Plant body of moss if gametophytic while that of Dryopteris is both gametophytic and sporophytic |
| Answer» Correct Answer - b | |
| 404. |
After karyogamy followed by meiosis, spres are produced exogenously inA. NeurosporaB. AltenariaC. AgaricusD. Saccharomyces |
| Answer» Correct Answer - C | |
| 405. |
A bryophyte suddenly started reproducing parthenogenetically. The number of chromosomes of the second generation compared to parent plant will beA. SameB. One-halfC. DoubleD. Triple |
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Answer» Correct Answer - a The number of chromosomes of the second generation will be same because no reduction division take place. |
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| 406. |
A Prothallus isA. a structure in pteridophytes formed be- fore the thallus developsB. a sporophytic free living structure formed in pteridophytesC. a gametophyte free living structure formed in pteridophytesD. a primitive structure formed after fertili- zation in pteridophytes |
| Answer» Correct Answer - c | |
| 407. |
In Fucus, the male and female gametes areA. MotileB. Non-motileC. Motile and non-motile respectivelyD. Non-motile and moltile respectively |
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Answer» Correct Answer - C In Fuscus the male and female gametes are motile and non-motile respectively. |
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| 408. |
Which of the following is/are grouped under phanerogamsA. AngiospermsB. GymnopermsC. PteridophytesD. Both a and b |
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Answer» Correct Answer - d Phanerogams means seed bearig plants. Gymnosperms and angiosperms both possess seeds. |
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| 409. |
An angiosperm is different from a gymnosperm in the absence ofA. Vacular tissueB. OvaryC. SeedD. Naked ovule |
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Answer» Correct Answer - d In Angiosperm seeds are enclosed within a hollow ovary. |
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| 410. |
The seed of Pinus sp. IsA. Uneconomic and nonendospermicB. Abaxial and roundedC. Adaxial and endospermicD. Hypogeal and monocothyledonous |
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Answer» Correct Answer - c Seed of Pinus is endospermic, perispermic diploid (2n). The wing of seed is thin, membrancous diploid (2x) and develops jointly from the basal upper surface (adaxial) of ovuliferous scale and outer layer of integument of the ovule. |
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| 411. |
Which one of the following is commonly called a "Maidenhair jerm"A. PteridiumB. AdiantumC. DryopterisD. Pteris |
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Answer» Correct Answer - b Adiantium-Maiden Hair fern (because of shining, smooth and blackish hair like petioles). |
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| 412. |
Pinus seed is originated inA. CapsuleB. MicrosporophyllC. MicrosporangiaD. Megaporophyll |
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Answer» Correct Answer - d Seeds are formed after fertilization and consequent6 enlargement of the ovule Two ovule or megasporium are present on the adaxial side of ovuliferous scale. The ovuliferous scale and bracts constiutes the megasporophyll. |
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| 413. |
which one of the following statements is correct?A. Vascular cryptogams are all heterosporousB. vascular cryptogams are all homosporousC. Archegoniates are all homosporousD. Spermatophytes are all heterosporous. |
| Answer» Correct Answer - D | |
| 414. |
Auxospores and hormocysts are formed respectively byA. Several diatoms and few cyanobacteriaB. Several cyanobacteria and several diatomsC. Some diatoms and several cyanobacteriaD. Some cyanobacteria and many diatoms |
| Answer» Correct Answer - C | |
| 415. |
Top-shaped multicilate male gametes, and the mature seed which bears only one embryo with two cotyledons, are chracteristic features ofA. Polypetalous angiospermsB. Gamopetalous angiospermsC. ConifersD. Cycads |
| Answer» Correct Answer - D | |
| 416. |
Which one of the following plants is monoeciousA. CycasB. PapayaC. MarchantiaD. Pinus |
| Answer» Correct Answer - D | |
| 417. |
Dichotomous branching is found inA. FermB. FunariaC. LiverwortsD. Polytrichum |
| Answer» Correct Answer - c | |
| 418. |
Dichotomous branching is found inA. fernB. FunariaC. liverworttsD. Marchantia |
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Answer» Correct Answer - D (d) Though many liverworts are dichotomously branched but some of the leafy liverworts are not. However, Marchantia is a liverwort is dichotomously branched. |
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| 419. |
Presence of basal rhizoidal cell in Ulothrix is an example ofA. Dead cellB. Vestigial cellC. Accessory cellD. Beginning of division of labour |
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Answer» Correct Answer - d Basal cell is nongreen but has nucleus and cytoplasm. Its presence show beginning of division of labour. |
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| 420. |
Which of the following pigments are found in brown algae?A. Chl a, Chl cB. Chl a, Chl dC. Chl a, Chl c ad fucoxanthinD. Chl a, phycoerythrin |
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Answer» Correct Answer - C The members of phaeophyceae or brown algae possess chlorophyll a, chlorophyll c, carotenoids and xanthophyll. They vary in colour depending upon the amount of the xanthophyll pigment, fucoxanthin present in them. |
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| 421. |
Number of flagella present in the gametes of Ulothrix isA. FourB. ThreeC. OneD. Two |
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Answer» Correct Answer - d The gamete are motile and biflagellate. |
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| 422. |
Lamionarin and mannitol, the reserve food of brown algae, areA. lipidsB. complex carbohydratesC. proteinsD. lipoproteins. |
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Answer» Correct Answer - B The food in the members of phaeophyceae is stored as complex carbohydrates in the form of laminarin or mannitol. |
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| 423. |
The largest bryophyte isA. Funaria (Moss)B. MarchantiaC. MegocerosD. Dowsonia |
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Answer» Correct Answer - d Newzealand genera of moss Dausonia which measures 60 cms in height. |
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| 424. |
Venter is the part ofA. SporogoniumB. SporangiumC. AntheridiumD. Archegonium |
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Answer» Correct Answer - d Venter is present in archegonia just above the egg. |
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| 425. |
What is the characteristic brancghing pattern of dictyota thallus?A. MonopodialB. ExcurrentC. DichotomousD. Deliquescent |
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Answer» Correct Answer - C Dictyota is a ribbon shaped dichotomously branched marine brown alga that grows in shallow water. Its frond is flat and dichotomously branched. |
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| 426. |
Assertion: Spirogyra is slippery in touch. Reason: Spirogyra consists a gelatinous sheath.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 In Spirogyra, the outermost portion of pectose changes into pectin. The latter dissovles in water to form the so called gelatinous sheath which is silmy. It envelopes the entire filament. This makes filament slippery in touch. |
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| 427. |
Antherozoids that are produced by bryophytes areA. Non-flagellatedB. BriflagellatedC. MultiflagellatedD. Multiciliated |
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Answer» Correct Answer - B Antherozoids that are produced by bryophytes are biflagellated. |
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| 428. |
Resin and terpentine are obtained fromA. CycasB. PinusC. CedrusD. Abies |
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Answer» Correct Answer - B (b) Pinus roxburghi is a source of resin and terpentine, obtained after distillation. Terpentine is utilised in varnishes and paints. |
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| 429. |
Bryophytes are amphibians becauseA. they require a layer of water for carrying out sexual reproductionB. they occur in damp placesC. they are mostly aquaticD. All of the above |
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Answer» Correct Answer - A (a) Bryophytes are called amphibians (amphibians of plant kingdom). They are first amongst land plants which occur in damp and shady habitats. As vascular tisues are absent, male gametes require a layer of water for swimming and fertilisation. |
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| 430. |
Brophyte which provides peat isA. SphagnumB. MarchantiaC. FunariaD. Polytrichum |
| Answer» Correct Answer - A | |
| 431. |
Assertion: Isogamy is a primitive type of sexual reproduction. Reason: The gametes are of diferent sizes.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 - d The fusing gametes in the lower forms of algae are alike in size, structure and behaviour. They are indistinguishable as to sex. Such gametes are called the isogemetes. Sexual reproduction which involves the fusion of isogametes is termed isogamous it is a primitive type of sexual reproduction. |
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| 432. |
Which one has the largest gametophyte?A. CycasB. AngiospermC. SelaginellaD. Moss |
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Answer» Correct Answer - D (d) Of the given options, moss has the largest gametophytte. It get reduced in the order as Selaginella, Cycas, angiosperms. Gametophyte begins with the haploid spore and ends with the formation of haploid gametes. Gametophyte gives rise to sporophyte (through sexual reproduction) and sporophyte gives rise to gametophyte. As one moves from thallophyte - bryophyte - Pteridophyte - gymnosperms - angiosperms, there is development in the sporophyte and reduction in the gametophyte. |
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| 433. |
Which of the following is used as a fuel and has a good capacity of water absorption ?A. RicciaB. MarchanitaC. SphagnumD. Funaria |
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Answer» Correct Answer - C Sphagnum is used as fuel and has a good capacity of water absorption. |
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| 434. |
Which provides peat that have long been used as fuel ?A. MarchantiaB. FurnariaC. SphagnumD. Polytrichum |
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Answer» Correct Answer - C Sphagnum provide peat that have long been used as fuel. |
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| 435. |
Largest gametophyte is found in .....A. AngiospermsB. PolytrichumC. NephrolepisD. Cycas |
| Answer» Correct Answer - b | |
| 436. |
Have capacity of absorbing water, used to replace cotton and used as a fuel isA. MarchanitiaB. RicciaC. SphognumD. Funaria |
| Answer» Correct Answer - c | |
| 437. |
Pteridium possessA. Polycyclic dictyosteleB. ActinosteleC. SiphonosteleD. Amphiphloic siphonostele |
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Answer» Correct Answer - a A dictyostele consisting of two or more concentric rings of meristeles e.g., Pteridium aquilinum. |
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| 438. |
Cycas leaflets areA. Sessile,Stratight, ovalB. Sessile, stragiht, linear-lanceolateC. Sessile,stragiht,spinyD. Sessile,smooth,twisted |
| Answer» Correct Answer - b | |
| 439. |
In which of the following, gametophyte is not independent in free living ?A. PterisB. PinusC. FunariaD. Marchantia |
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Answer» Correct Answer - B In Pinus (gymnosperm) gametophyte is not independent free living. |
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| 440. |
In which of the following bryophytes, thallus contains a `N_(2)`- fixing cyanobacteriaA. AzollaB. MarsileaC. CycasD. Anthoceros |
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Answer» Correct Answer - D In Anthoceros, thallus contains a `N_(2)`- fixing cyanobacteria. |
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| 441. |
The sporophytic phase in funaria is well developed and composed ofA. capsule onlyB. spore sacC. foot and capsuleD. foot, seta and capsule. |
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Answer» Correct Answer - D Sporophyte of Funaria has embedded foot, an elongated curved seta and a terminal pyriform capsule. Sporophyte is nutritionally dependent on gametopyte. |
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| 442. |
Archegoniophore is present inA. Funaria (Moss)B. MarchantiaC. CharaD. Adiantum |
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Answer» Correct Answer - b Stalk bearing archegonial cluster at tip in Marchantia thallus. |
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| 443. |
Resemblances between algae and bryophytes includeA. presence of root-like, stem-like structuresB. Thallus-like plant body, lack of vascular tissue, autotrophic nutritionC. thallus-like plant body, presenece of vascular tissue, autotrophic of roots, heterotrophic nutrition.D. |
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Answer» Correct Answer - B The resemblances between algae and bryophytes are given below (i). Algae and bryophytes both are autotrophic. (ii). Algal plant body is a thallus, lioke many bryophytes (Hepaticeae andAnthocerotae). (iii). In both, reserve food material is generally stach. (iv). Both lack vascular tissues. (v). Water is essential for fertilisation in algae as well as in bryophytes. |
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| 444. |
Huxley is considered to be the founder ofA. Classical systematicB. New systematicC. Phylogenetic system of classificationD. Artifical system of classification |
| Answer» Correct Answer - B | |
| 445. |
The sexual system of classification isA. Artificial systemB. Based on stamens charactersC. Based on corolla and carpels charactersD. Both (1) and (2) |
| Answer» Correct Answer - D | |
| 446. |
The basis of dendrogram isA. PheneticsB. TaximetricsC. Numerical taxonomyD. All of these |
| Answer» Correct Answer - D | |
| 447. |
The father of taxonomy described plants in his bookA. 480, Historia PlantarumB. 340, Historia NaturalisC. 18000, Historia Generalis PlantarumD. 5900, Species Plantarum |
| Answer» Correct Answer - D | |
| 448. |
The term a-taxonomy was introduced byA. John RayB. HutchinsonC. BasseyD. Turril |
| Answer» Correct Answer - D | |
| 449. |
Which alga is used for commercial production of Agar ? |
| Answer» Correct Answer - Gelidium | |
| 450. |
Name the characters considered in cytotaxonomic studies. |
| Answer» Cytoplaxonomy is based on the cytological studies such as chromosome number, structure, behaviour, etc. | |