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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.
| 351. |
How many species of marine algae are used as food ?A. 17B. 7C. 70D. 71 |
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Answer» Correct Answer - C 70 species of marine algae species are used as food |
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| 352. |
Male gametophyte with least number of cells is present inA. PinusB. PterisC. FunariaD. Lilium |
| Answer» Correct Answer - D | |
| 353. |
Male gametophyte with least number off cells is presentt inA. PterisB. FunariaC. LiliumD. Pinus |
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Answer» Correct Answer - C (c) Lilium (angiosperm) possesses th male gametophyte with least number of cells. The number of cells in male gametophyte shows the pattern of reduction from bryophytes to angiosperms. In angiosperms, it is reduced to about 2-3 celled and called as pollen grains. The number of cells in male gametophyte decreases in he following order Funaria gt Pteris gt Pinus gt Lilium |
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| 354. |
Male gametophyte with least number of cells is present inA. LillumB. Pinus monophyllaC. PterisD. Funaria |
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Answer» Correct Answer - a Male gametophyte is highly reduced in angiosperms and is known as pollen grain. It is 2 or 3-celled. |
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| 355. |
Assertion: Funaria multiplied vegetatively by means of bulbils. Reason: Bulbils and tubers are two different structures.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 - c The formation of small, underground resting, budlike structures called the tubers has also been reported in some mosses. Formerly these underground bud-like structures were called the bulbils. The tubers develop singly on stem, leaves and rhizoids as small, spherical storage organs containing starch. These serve as means of perennation and enable the plant to tide over periods unfavourable for vegetative growth. |
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| 356. |
In fern, spores are formed inA. SporangiumB. OogoniumC. ArchegoniumD. Stomium |
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Answer» Correct Answer - a The plants of pteridophytes are sporophytes. They reproduce asexually by forming spores in sporangia. |
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| 357. |
Apophysis in the capsule of Funaria isA. lower partB. upper partC. middle partD. fertile part |
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Answer» Correct Answer - A (a) Capsule (the body containing spores) of Funaria is differentated into-operculum (cap shaped 2-3 layered thick lid on theh top), theca (middle fertile part) and apophysis (sterile, solid basal portion of the capsule having chlloroplasts). |
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| 358. |
The cells of fern prothallus contains nucleus withA. 4n chromosomesB. 3n chromosomesC. 2n chromosomesD. n chromosmes |
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Answer» Correct Answer - d Prothallus is haploid. |
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| 359. |
In fern plant, the ejection of spores with force is achieved by theA. SporangiophoreB. AnnulusC. StomiumD. Indusium |
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Answer» Correct Answer - b Annulus controls and assits in spore dispersal by losing water. Annulus also helps in the ejection of spores with force like a sling. |
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| 360. |
Palmella stage is producedA. In rainy seasonB. During unfavourable conditionsC. During favourable conditionsD. None of the above |
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Answer» Correct Answer - b In dry conditions, zoospores get surrounded by mucllaginous sheath. This is known as Palmella stage. Under favourable conditions each zoospores gives rise to a new plant e.g., Chlamydomonas. |
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| 361. |
Identify the parts labelled as A andB in the given figure of Equisetum and select the correct optionA. `{:(A,B),("Stroblus","Rhizome"):}`B. `{:(A,B),("sporophylls","tuber"):}`C. `{:(A,B),("Sporangia","Rhizome"):}`D. `{:(A,B),("Sporophyte","tuber"):}` |
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Answer» Correct Answer - A In Equisetum, plant body is differentiated into stem, lveaves and roots. Adventitious rots develop in whorls over the nodes of rhizome. Aerial branches develop terminal strobili in E. arvense, these are two types of aerial branches, green sterile and brown fertile. Terminal strobili occurs only on fertile branches. |
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| 362. |
Which is not a part of moss capsuleA. PeristomeB. ProtonemaC. Theca from opperculumD. Annulus |
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Answer» Correct Answer - b Protonema is formed after germination of moss capsule spores. |
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| 363. |
Identify the plants shown in figure and select the correct option:A. `{:(A,B),("Equisetum","Fern"):}`B. `{:(A,B),("Selaginella","Equisetum"):}`C. `{:(A,B),("Selaginella","Salvinia"):}`D. `{:(A,B),("Equisetum","Fern"):}` |
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Answer» Correct Answer - C Plants given in the figure areA-Selaginella and B-Salvinia. |
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| 364. |
In moss, reduction division takes place inA. CapsuleB. ArchegoniaC. AnteridiumD. At the tip of rhizoids |
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Answer» Correct Answer - a When the capsule approches maturity the sporogenous cells cease to divide, separate from one another and they are known as spore mother cells. Each spore mother cell undergoes two successive divisions, first of which is meiotic and forms four spores with haploid number of the chromosomes. |
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| 365. |
Assertion: Pinus is monoecious. Reason: Each sporophyll bears only one microsparangia.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 - c Pinus is monoecious as it bears both types of cones on the same tree on separate branches. The male cone consists of a number of small spirally arranged microsporophylls. Each microsprocphyll bears two microsporangia or pollen sacs as swelling on the lower surface of its horizontal position. |
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| 366. |
The plant body of the brown algae is attched to the substratum byA. HoldfastB. StipeC. StalkD. Front |
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Answer» Correct Answer - A The plant body of the brown algae is attached to the substratum by holdfast. |
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| 367. |
Read the given statements ad select the correct option. Statement-1: Main plant body of bryophytes is sporophytic. Statement-2: Main plant body of pteridophytes is gametophyticA. Both statements 1 and 2 are correctB. Statement 1 is correct but statement 2 is incorrectC. Statement 1 is incorrect but statement 2 is correct.D. Both statement 1 ad 2 are incorrect. |
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Answer» Correct Answer - D Main plant body is gametopytic in bryophytesand sporophytic in pteridophytes. |
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| 368. |
Assertion: The young stem of Funaria is photosynthetic. Reason: It contain hydroids.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 - b In young stems of Funaria, the cortical cells contain chloroplasts, hence, they are photosynthetic. The central cylinder forms the core of the stem. It consits of vertically elongated , thin-walled, narrow, compactly arranged cells without protoplasm. These thin walled, elongate, dead cells with nonlignified walls are commonly called the hydroids. |
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| 369. |
Funaria is attached to substratum byA. RootsB. RhizoidsC. HaustoriaD. Stem |
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Answer» Correct Answer - b Funaria is attached to substratum by rhizoids are branched, multicellular, arise from base of axis and have oblique septa to increase. |
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| 370. |
Which of the following statements is incorrect?A. Mosses along with lichens are the first organisms to colonise rocks.B. Sphagnum is used as packing material for transportation of liveng materialC. in liverworts, spores are produced after meiosis within the capsule.D. Funaria possesses unicellular unbhanched rhizoids. |
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Answer» Correct Answer - D Funaria has a radial symmetry with a once branched axis or stem,a number of spirally arranged leaves and branched colourless multicellular rhizoids. The axis is aerial, erect, slender and monopodially branched. |
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| 371. |
Protonema isA. Fossil pteridophyteB. A part of the sporophyte of FunariaC. The juvenile phase of the moss gametophyteD. None of the above |
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Answer» Correct Answer - c Protonema. It is green, septate, filamentous algae like which is borne after the germination of moss haploid spores. |
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| 372. |
In a moss the sporophyteA. Arises from a spore produced from the gemetophyteB. Manufactures food for itself, as well as for the gemetophyteC. Is partially parastic on the gametophyteD. Produces gametes that give rise to the gametophyte |
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Answer» Correct Answer - c The sporophytic is parasitic over gametophyte. Thus there is heteromorphic or heterologous alternation of generations in Riccia. So life cycle in Riccia is diplohaplontic. |
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| 373. |
Which one of the following statements is wrong.A. Larminaria and Surgassum are used as foodB. Algae increase the level of dissolved oxygen in the immediate enviromentC. Algin is obtained from red algae, and GracilariaD. |
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Answer» Correct Answer - c Algin is obtained from brown algae and carrageenin from red algae. |
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| 374. |
______sysrtems of classification were based on nature affinities among the organisms.A. ArtificialB. NaturalC. PhylogeneticD. sexual |
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Answer» Correct Answer - B Natural system of classification takes into consideration comparable sudy of number of characters so as to bring out natural similarities and dissimilarities and hence natural relationships among the organisms. They include morphological characters, anatomical characters, cytological characters, physiology, ontogeny or developpment, reproduction, cytochemistry and biochemistry, experimental taxonomy etc. |
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| 375. |
Spirogyra increases its body length by the division ofA. The apical cellB. The basall cellC. Every cell of the bodyD. Accumlation of fodd in this body |
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Answer» Correct Answer - c Spirogyra increases its body length because every cell of the filament is capable of growth division and self maintainance (Every cell has nucelus). |
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| 376. |
Spirogyra is aA. Fresh water and free floating algaB. Marine and free floating algaC. Fresh water and locomotory algaD. None of the above |
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Answer» Correct Answer - a Spirogyra is a free floating. Filamentous, green, freshwater alga which is popularity called pond silk, hair of princess because its filaments are silmy to touch and shine in water. |
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| 377. |
Sexual reproduction in Spirogyra involves fusion ofA. Two similar motile gametesB. Two similar non-motle gemetes but physiological dissimilarC. One motile and one non-motile gametesD. Two dissimilar motile gametes |
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Answer» Correct Answer - b Sexual reproduction in Spirogyra involves the fusion of two morphologically identical but physiologically dissimilar noncillated gametes. |
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| 378. |
Non-motile gametes are characteristically found inA. ChrysophytaB. RhodophytaC. PhaeophytaD. Chlorophyta |
| Answer» Correct Answer - B | |
| 379. |
Meiosis occurs in green algae insideA. GametangiaB. ZygoteC. SporangiaD. Zygospore |
| Answer» Correct Answer - D | |
| 380. |
Non-vascular archegoniates areA. ThallophytaB. PteridophytaC. BryophytaD. Gymnosperms |
| Answer» Correct Answer - C | |
| 381. |
What is the chromosome number in calyptra, perichaetial cells, columella and protonema if endothecium cell contains 20 chromosomes?A. 10, 10, 20, and 10, respectivelyB. 10, 20, 20, and 10, respectivelyC. 20, 10, 20, and 10, respectivelyD. 10, 10, 20, and 10, respectively |
| Answer» Correct Answer - A | |
| 382. |
Antheridial branch and archegonial branch are found in the same plant body ofA. HornwortsB. Sea weedsC. LiverwortsD. Cotton moss |
| Answer» Correct Answer - D | |
| 383. |
Formation of gametophyte directly from sopore mother cell without meiosis is calledA. AposporyB. ApogamyC. ApomicticD. Apomixis |
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Answer» Correct Answer - a Apospory was first observed by Druery (1884) in Athyrium filix-femina. Apospory is the formation of complete embryo sac from the sporophytic cell without meiosis so that the gametophyte remains diploid. |
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| 384. |
Name the different types of present in brown algae. |
| Answer» Chlorophyll a & c, carotenoids and xanthophylls. | |
| 385. |
Holdfast, stipeand frond constitute the plant body in case ofA. RhodophyceaeB. ChlorophyceaeC. PhaeophyceaeD. all of these. |
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Answer» Correct Answer - C Phaeophyceae (brown algae) are eukaryotic marine algae. The body consists of branched filamentous structure in lower forms (e.g.,Ectocarpus) and parenchymatous structure in higher forms (e.g.,sargassum). The plant body is often differentiated into holdfast, stipe and lamina (frond). Lamina may besimple or divided variously and is photosynthetic. |
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| 386. |
What is the function of frond in brown algae ? |
| Answer» Frond is leaf-like photosynthetic organ for photosynthesis. | |
| 387. |
What are the constituents of cell wall in green algae ? |
| Answer» In green algae the cell wall is made up of an inner layer of cellulose and an outer layer of pectose. | |
| 388. |
Sex-organs of pteridophytes areA. Multicelluar and jacketedB. Unicellular and jacketedC. Unicellular and non jacketedD. Multicellular and non jacketed |
| Answer» Correct Answer - A | |
| 389. |
Green algae usually have a rigid cell wall made of an inner layer of ____and an outer layer of_____.A. cellulose,celluloseB. pectose,pectoseC. pectose,celluloseD. cellulose,pectose |
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Answer» Correct Answer - D Cell wall of green algae is thin, transparent and firm and consists of outer pectic and inner cellulosic layers. It is smooth but in most of species it gets thickened at the anterior end to form an apical popilla. |
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| 390. |
The chloroplasts of algae usually lackA. QuantasomesB. LamellaeC. Pigments reticulumD. Grana |
| Answer» Correct Answer - D | |
| 391. |
Heteromorphic alternation of generation is found inA. Spirogyra sahniiB. MucorC. SelaginellaD. Pinus |
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Answer» Correct Answer - c In Selaginella, sporophytic and gametophytic generation are morphologically as well as genetically differ. |
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| 392. |
Assertion: The mesophyll of Pinus shows no distinction as mesophyll and palisade. Reason: Parenchymatous cells are present in mesophyll of Pinus.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 - b Within the hypodermis of pinus leaf is the parenchymatous mesophyll. It is compart and shows no differentiation mesophyll. It is compart and shows no differrentiation into plaisade and spongy tissues. It consists of thin walled cells which contain numerous chloroplasts and abundant starch. the mesophyll thus functions as the chlorophyll bearing tissue which manufactures food for plansts. |
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| 393. |
Which of the following is not common in Funaria and selaginellaA. RootsB. ArchegoniumC. EmbryoD. Motile sperms |
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Answer» Correct Answer - a Roots present in Selaginella and rhizoids present in Funaria. |
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| 394. |
Which one of the following is not common between Funaria ad Selaginella?A. ArchegoniumB. EmbryoC. Flagellate spermsD. Roots |
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Answer» Correct Answer - D (d) Roots are not the common structure in Funaria and Selaginella. Funaria (moss) and Selaginella (pteridophytes) can be related with the presence of archegonium, embryo, flagellated sperms. In Funaria, the plant is attached to the substratum by means of root-like structures called rhizoides, which are multicellular, branched, have oblique cross wall. In Selaginella, special leafless positively geotropic structures called rhizophores arise fromthhe stem at the point of branching. Rhizophore resembles the stem in some characters and roots in other characters and was regardedas organ-sui-genesis (organ of independent origin). |
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| 395. |
The plant group in which sporophytes generation is represented by zygote onlyA. Algae/Chlamydomonas/UlothrixB. Bryophyte/Moss/LiverwordsC. Pteridophyte/Ferm/SelaginellaD. Gymnosperm/Cycas/Pinus |
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Answer» Correct Answer - A The plant group in which sporophyte generation is represented by zygote only algae/chalmydomoas/Ulothrix. |
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| 396. |
A plant in which sporophytic generation is represented by zygote isA. PinusB. SelaginellaC. ChlamydomonasD. Dryopteris |
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Answer» Correct Answer - C (c) In Chlamydomonas, the plant body is haploid, and representts gametophyte. It reproduces asexually through the formation of zoospores and sexually through gametes. Gametes (haploid) fuse to produce diploid zygote, representing the sporophytic generation. The zygote secretes a wall around it to become a resting zygospore(diploid). The zygote and zygospore are the only diploid structure which represents the diplophase. |
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| 397. |
Which of the following cannot fix nitrogen?A. NostocB. AzotobacterC. SpirogyraD. Anabaena |
| Answer» Correct Answer - C | |
| 398. |
Read the following statement (A-E) and answer the equestion which follows them (A) In liverworts, mosses and fems fametophytes are free living (B) Gymnospers and some ferms are heterosphorous (C) Sexual reproduction if Fucus, Volvox and Allbugo is oogamous (D) The sporophyte in liverworts is more elaborate than that in mosses (E) Both, Pinus and Marchantia are dioecious How many of the above statements are correctA. ThreeB. FourC. OneD. Two |
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Answer» Correct Answer - A d and e are incorrect statements The sporophyte in liverworts is less elaborate than that in mosses Pinus is monoecious, Marchantia is dioecious. |
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| 399. |
In Dryopteris the opening mechanism of sporangium is effectively operated byA. StalkB. StomiumC. AnnulusD. None of these |
| Answer» Correct Answer - b | |
| 400. |
Assertion: Spores in mosses are contained within the capsule. Reason: Spores are formed by mitotic division in mosses.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 - C In misses, after fertilisation, the zygote develops into a sporophyte,consisting of a foot, setaand capsule. The Sporophyte in mosses is more elaborate than that in liverworts. The capsule contains spores. Spores are formed after meiosis and develop into new gametophye. |
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