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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.
| 751. |
Which type of life-cycle is shown by Kelps, Ectocarpus and Polysiphonia ?A. HaplonticB. DiplonticC. HaplodiplonticD. Isomorphic |
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Answer» Correct Answer - C Haplodiplontic type of life-cycle shown by kelps, Ectocaropus and polysiphonia. |
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| 752. |
Select the option that correctly identifies A,B and C in the given figure of female thallus of Marchantia.A. A-Antheridiophore, B-Gemma cup, C-RhizoidsB. A-Antheridiophore, B-Rhozoids, C-Gemma cupC. A-Archegoniophore,B-Gemma cup, C-RhizoidsD. A-Archegoniophore, B-Rhizoids,C-Gemma cup |
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Answer» Correct Answer - C Marchantia is dioecious plant, sec organs borne on stalked upright receptacles or gametophores. Gametophore of male thallus is called antheridiophore having a stalk and a 8 lobed male receptacle. Gametophore of female thallus is caleed archegoniphore. its receptacle has nine cylindrical proceses or rays. |
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| 753. |
Which of the following options correctly identifies the plants shonw in figure and thhe group it belongs to?A. Marchantia-LiverwortB. Sphagnum-MossC. Sphangum-liverwortD. Funaria-Moss |
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Answer» Correct Answer - B Plant shown in the figure is Sphagnum it is a bryophyte, commonly called as peat moss. |
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| 754. |
One of the following is of considerable economic importanceA. RicciaB. FunariaC. MarchantiaD. Sphagnum |
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Answer» Correct Answer - d Sphagnum is used as fuel. Sphagnum has the capacity to retain water for long periods and as such is used to cover the plant roots during transportation. It is also used in seed beds because of its high water retention capacity. |
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| 755. |
Assertion: The peristome is a fringe of teeth-like projections found at the mouth of the capsule. Reason: It may be of two types nematodontous and orthodontus.A. If both assertion and reason are true and the reason is a correct explanation of the assertionB. If both assertion and reason are true but reason is not a correct explanation of the assertionC. If the assertion is true but reason is falseD. If both the assertion and reason are false |
| Answer» Correct Answer - B | |
| 756. |
Assertion: The peristome is a fringe of teeth-like projections found at the mouth of the capsule. Reason: It may be of two types nematodontous and orthodontus.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 The peristome teeth are present at the mouth of capsule. The teeth may be solid cellular tissue or composed only of the thickened portions of the cell walls of adjacent cells. When the teeth of peristome are solid structures composed of bundles of dead cells, it is termed nematodontous persistome are solid structures composed of bundles of dead cells. it is termed nematodontous peristome. It is found in polytrichum, Pogonatum and Tetraphis. if peristome composed of thin, membranous, transversaly barred teeth, each tooth is made up of the thickned portions of the cell walls of adjacent cells. Such a peristome is called orthodontous. |
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| 757. |
Popular dry fruit "Chilgoza" is produced byA. Pinus sylvestrisB. Pinus monophyllaC. Pinus gerardianaD. Pnus roxburghii |
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Answer» Correct Answer - c Chilgoza is seed of Pinus. |
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| 758. |
A plant shows thallus level of organisation.it shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile . It may belong toA. pteridopytesB. gymnospermsC. monocotsD. bryophytes. |
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Answer» Correct Answer - D Bryophyes are non-vascular terrestrial plants of moist habitat in which a multicellular diploid sporophyte lices as a parasite on an independent multicellular haploid gametophyte that develops multicellular jacketed sex organs. True roots are absent, instead rhizoilds occur, which may be unicellular or multicellular. An external layer of water is essential for the swimming of male gametes to the archegonia. |
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| 759. |
Which of the following gymnosperm is a bushy tralling shrubA. EphedraB. CycasC. PinusD. Aurocaria |
| Answer» Correct Answer - A | |
| 760. |
From which of the following plants is a medicine for respiratory disorders obtained?A. BambusaB. SesamumC. EphedraD. Pinus |
| Answer» Correct Answer - C | |
| 761. |
Fusion of two motile gamtes which are dissimilar in size is termed asA. OogamyB. IsogamyC. AnisogamyD. Zoogamy |
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Answer» Correct Answer - C Fusion of two motile gametes which are dissimilar in size is termed as anisogamy. |
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| 762. |
In pteridophytes, pholem is withoutA. Sieve cellsB. Sieve tubesC. Companion cellsD. Both b and c |
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Answer» Correct Answer - c In xylem, vessels are absent and in phloem, companion cellsa are absent. Selaginella and Equisetum are exception where vessels are present. |
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| 763. |
Fusion of two gaemtes which are dissimilar in size is termed asA. OogamyB. IsogamyC. AnisogamyD. Zoogamy |
| Answer» Correct Answer - c | |
| 764. |
Ulothrix and Spirogyra reproduces vegetatively byA. FragmentationB. FissionC. BuddingD. All of the above |
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Answer» Correct Answer - A Ulothrix and Spirogyra (both are filamentous algae hence) reproduces vegetatively by fragmentation. |
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| 765. |
Male gametes of cycads areA. Rounded and nonciliateB. Stickle-shaped bifagellateC. Boat-shaped nonciliateD. Large,top-like,spirally twisted with cilia |
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Answer» Correct Answer - d The male gametes of cycas are largest `(300 mu)` in nature, broad and naked at posterian end and spirally coiled in the anterior half with thousands of small cillia. |
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| 766. |
Indepdent sporophyte is not found inA. BryophytaB. PteridophytaC. GymnospermD. Angiosperm |
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Answer» Correct Answer - A Independent sporophyte does not found in bryophyta (dependent on gametophyte). |
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| 767. |
Ulothrix and Spirogyra areA. Colonial and branchedB. Solitary and branchedC. Filamentous and unbranchedD. Filamentous and branched |
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Answer» Correct Answer - C Ulothrix and Spirogyra are filamentous and unbranched. |
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| 768. |
Evolutionary important character of Selaginella isA. heterosporous natureB. rhizophoreC. strobiliD. ligule |
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Answer» Correct Answer - A (a) Heterospory, i.e. The production of two different types of spores : larger macrospores and smaller microspores is acharacter of evolutionary significance in pteridophyte (Selaginella) because seed habit (characteristic feature of gymnosperms and angiosperms) and differentiation of spores on the basis of sex is believed to have originated from heterosporous conditions. |
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| 769. |
In Cycas, the endosperm isA. Sporophytic structureB. Gametophytic structureC. New structureD. Formed after fertilization |
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Answer» Correct Answer - b The endospoerm in cycas is a haploid gametophytic tissue formed before fertilization. |
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| 770. |
The structure that are haploid in Pinus areA. Megaspore, embryo and endospermB. Megaspore, pollen grain and endospermC. Leaf, root and embryoD. Integument,megaspore and root |
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Answer» Correct Answer - B The structure that are haploid in Pinus are megaspore, pollen grain and endosperm. |
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| 771. |
Which of the following structures in Pinus are haploidA. Megaspore,endosperm and embryoB. Microspore,megaspore and endospermC. Megaspore, integument and rootD. Microspore,leaf and endosperm |
| Answer» Correct Answer - B | |
| 772. |
In Pinus/gumnosperms, the haploid structure areA. megaspore, endosperm and embryoB. megaspore, pollen grain and endospermC. megaspore, integument and rootD. pollen grain, leaf and root |
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Answer» Correct Answer - B (b) In gymnosperms, the megaspore (haploid) is first cell of female gametophyte and undergoes repeated divisions to form a multicellular female gametophyte, which because of abundant food reserves, serves as endosperm. So, being produced before fertilisation, endosperm is haploid in gymnosperms. Microspored or pollen grains are the first cell of the male gametophyte and are haploid in nature. |
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| 773. |
If the haploid number of chromosomes in Pinus is 12, the number in its endosperm cells will beA. 12B. 24C. 36D. 6 |
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Answer» Correct Answer - a Because endosperms of Pinus are always haploid and is formed before fetilization in ovules. |
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| 774. |
A Prothallus isA. a structure in pteridophytes formed before the thallus developsB. a sporophytic free living structure formed in pterdophytesC. a gametophyte free living structure formed in pterdophytesD. a primitive structure formed after fertilisation in pteridophytes s |
| Answer» Prothallus is usually a gametopytic stage in the life of a pteridophyte. Spore germinates to from a prothalium , it is short inconspicuous hert shaped structure with the a number of rhizoids developd beneath and sex organs, archegonium and antheridium. | |
| 775. |
A : Endosperm in Cycas is haploid in nature. R : Cycas roots shows association with oxyphoto - bacteria.A. If the Assertion & Reason are true and the reason is the correct. Explanation of the assertion.B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.C. If Assertion is true statement but Reason is false.D. If both Assertion and Reason are false statements. |
| Answer» Correct Answer - B | |
| 776. |
What is the function of endosperm ? |
| Answer» It provides nourishment to the developing embryo. | |
| 777. |
Which of the following is a vascular cryptogamA. MarchantiaB. GinkgoC. EquisetumD. Cedrus |
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Answer» Correct Answer - C A vascular cryptogam is Equisetum (as it is pteridophyte) |
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| 778. |
Macrocystis is aA. Greem algaeB. Brown algaeC. Red algaeD. Bryophytes |
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Answer» Correct Answer - B Macrocystis belongs to brown algae. |
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| 779. |
Which is obtained from gymnosperm plant ?A. CashewnutB. AlmondC. ChilgozaD. Pistachio |
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Answer» Correct Answer - C Chilgoza is obtained from gymnosperm plant (Pinus gerardiana). |
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| 780. |
Name one drug obtained from gymnosperm. Give its one use. |
| Answer» Ephedrine. It is used in curing respiratory ailments. | |
| 781. |
Dichotomous branching is found inA. LiverwortsB. PteridophytesC. FernD. funaria |
| Answer» Correct Answer - A | |
| 782. |
Elater mechanism for seed dispersal is exhibited byA. LiverwortsB. MarchantiaC. RicciaD. Funaria |
| Answer» Correct Answer - B | |
| 783. |
A spore of Spirogyra sp. after resting period isA. HaploidB. DiploidC. AplanosporeD. Zygospore |
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Answer» Correct Answer - a A spore of Spirogyra sp. After resting period (zygospore) is haploid because meiosis occurs in zygospore. |
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| 784. |
Name a unicelluar plant which is several cm long. |
| Answer» Acetabularia. | |
| 785. |
Archegoniophore is present inA. FunariaB. MarchantiaC. CharaD. Adiantum |
| Answer» Correct Answer - B | |
| 786. |
Compared with the gametophytes of the bryophytes the gametophytes of vascular plants tent to beA. smaller and to have smaller sex organsB. smaller but to have larger sex organsC. larger but to have smaller sex organsD. larger and to have larger sex organs |
| Answer» Correct Answer - A | |
| 787. |
Compared with the gametophytes of the bryophytes the gametophytes of vascular plants tent to beA. Small and to have smaller sex organsB. Smaller but to have larger sex organsC. Larger but to have smaller sex organsD. Larer and to have larger sex organs |
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Answer» Correct Answer - a Gametophytes are reduced and few celled in al vascular plants. |
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| 788. |
Compared with the gametophytes of the bryophytes, the gametophytes of vascular plants tend to be:-A. smaller but to have sex organsB. larger but to have smaller sex organsC. larger and to have larger sex organsD. smaller and to have smaller sex organs |
| Answer» Correct Answer - D | |
| 789. |
Compared with the gametophytes of the bryophytes, the gametophytes of vascular plants tend to be:-A. Smaller and to have smaller sex organsB. Smaller but to have larger sex organsC. Larger but to have smaller sex organsD. Larger and to have larger sex organs |
| Answer» Correct Answer - A | |
| 790. |
Archegoniophore is present inA. FunariaB. MarchantlaC. CharaD. Adiantum |
| Answer» Correct Answer - B | |
| 791. |
A prokaryotic autotrophic nitrogen fixing symbiont is found inA. CycasB. CicerC. PisumD. Alnus |
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Answer» Correct Answer - A (a) the coralloid root of Cycas is symbiotically associated with nitrogen fixing blre-green algae, Anabaena cycadae and Nostoc punctiforme. These blue green-algae (cyanobacteria) are prokaryotic, photosynthetic and autotrophic. |
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| 792. |
Archegoniophore is present inA. MarchantiaB. CharaC. AdiantumD. Funaria |
| Answer» Correct Answer - A | |
| 793. |
Algae have cell wall made up ofA. Cellulose, galactans and mannansB. Hemicellulose, pectins and proteinsC. Pectins, cellulose and proteinsD. Cellulose, hemicellulose and pectins |
| Answer» Correct Answer - A | |
| 794. |
Some hyperthermophilic organisms that grow in highly acidic `(pH2)` habitats belong to the two groupsA. Eubacteria and archaeaB. Cyanobacteria and diatomsC. Protists and mossesD. Liverworts and yeasts |
| Answer» Correct Answer - A | |
| 795. |
Algae have cell wall made up ofA. cellulose, hemicellulose and pectinB. cellulose, galactans and mannansC. hemicellulose, pectins and proteinsD. pectins, cellulose and proteins. |
| Answer» Correct Answer - D | |
| 796. |
In CycasA. Male cones and female cones are present on same plantB. Male cones and female cones are present on different plantsC. Male cones and megasporophylls are present on same plantD. Male cones and megsporophylls are found one different plants |
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Answer» Correct Answer - D In Cycas male cones and megasporophylls are found on different plant. In Cycas female cone in absent. |
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| 797. |
In most of the algae, the storage food product isA. StarchB. MannitolC. LaminarinD. Glycogen |
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Answer» Correct Answer - A In most of the algae, the storage food product is starch. |
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| 798. |
Roots of the Cycas areA. CaoralloidB. SimpleC. Both A and BD. None of the above |
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Answer» Correct Answer - C Roots of the Cycas are both coralloid and simple. |
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| 799. |
Find the correct match A. (a) `rarr` (i), (b) `rarr` (v), (c) `rarr` (ii), (d) `rarr`(iii)B. (a) `rarr` (i), (b) `rarr` (v), (c) `rarr` (iii), (d) `rarr` (ii)C. (a) `rarr` (iii), (b) `rarr` (v), (c) `rarr` (i), (d) `rarr` (ii)D. (a) `rarr` (i), (b) `rarr` (v), (c) `rarr` (ii), (d) `rarr` (iv) |
| Answer» Correct Answer - A | |
| 800. |
Thick-walled perennating sexual spore isA. ZygoteB. ZoosporeC. HypnosporeD. Zygospore |
| Answer» Correct Answer - D | |