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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.
| 651. |
Exine in pollen grain in made up ofA. PectocelluloseB. LignoscelluloseC. sporopolleninD. pollen kit |
| Answer» Correct Answer - C | |
| 652. |
Which of the following statements about sporopollenin is incorrect ?A. Exine is made up of sporopolleninB. Sporopollenin is one of the resistant organic materialsC. Exine gas apertures called germ pores where sporopollenin is presentD. Sporopollenin can withstand high temperatures and strong acids. |
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Answer» Correct Answer - C The germ pores are apertures in the exine layer of pollen grain where sporopollenin is absent. |
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| 653. |
Several pollen grains form a unit designated as pollinium in FamilyA. AsteraceaeB. CucuribitaceaeC. AsclepiadaceaeD. Brassicaceae |
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Answer» Correct Answer - C In Calotropis and related plants of Family Asclepiadaceae, all the pollen grains of an anther lobe remain united in a single sac called pollinium. Two pollinia of adjacent anthers are attached to produce a translator. |
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| 654. |
One of the most resistant biological material present in the exine of pollen grain isA. pectocelluloseB. sporopolleninC. suberinD. cellulose |
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Answer» Correct Answer - B Outer layer (exine) of pollen grain is made of a highly resistant substance called sporopollenin. Sporopollenin is not degraded by any enzyme. It is not affected by high temperature, strong acid or strong alkali. Because of sporopollenin, pollen grains are well preserved as fossils. |
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| 655. |
How many pollen mother cells should undergo meiotic division to produce 64 pollen grains?A. 64B. 32C. 16D. 8 |
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Answer» Correct Answer - C Each pollen mother cell `(PMC)`, by a meiotic division, gives rise to a group of four haploid microspores. Thus, `16` pollen mother cells undergo meiotic divisions to produce 64 pollen grains. |
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| 656. |
How many meiotic divisions are required for the formation of 100 pollen grains ?A. 100B. 50C. 25D. 26 |
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Answer» Correct Answer - C Each microspore mother cell or polllen mother cell `(PMC)` on reduction division (meiosis) gives rise to 4 pollen grains. Hence, to form 100 pollen grains, 25 meiotic divisions are required. |
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| 657. |
In a case of polyembryony if an embryo develops from the synergid and another from the nucellus, then the synergid embryo is `ul((i))` and nucellar embryo is `ul((ii))`.A. `{:((i),(ii).),("triploid","haploid"):}`B. `{:((i),(ii).),("diploid","haploid"):}`C. `{:((i),(ii).),("haploid","diploid"):}`D. `{:((i),(ii).),("diploid","triploid"):}` |
| Answer» Correct Answer - C | |
| 658. |
Embryo developed from nucellus and integument is known as:A. AposporyB. ApogamyC. ApomixisD. Adventive embryony |
| Answer» Correct Answer - D | |
| 659. |
A: Tetrapid gametophyte can be produced form tetraploid sporophyte by menas of apogamy R:L Apogamy involves fertilisation not meiosisA. if both assetion A reason are ture and the reason is the correct explanation of the assertion then markB. if both assertion & reason are ture and the reason is not the correct explanation of the assertin then markC. if assertion is true statement but reason is false then markD. if both assertion and reason are flase statements then mark |
| Answer» Correct Answer - D | |
| 660. |
Total number of meiotic division required for forming 100 zygotes/100 grains of wheat isA. 100B. 75C. 125D. 50 |
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Answer» Correct Answer - C Total number of meiotic divisions required for forming 100 zygote/100 grains of wheat are 125. Zygote is the fusion product of pollen grains and egg. 100 zygotes require 100 pollen grains and 100 embryo sacs. 100 pollen grains are produced from 25 microspore mother cells while 100 embryo sacs are formed from 100 functional megaspores which as a result being produced by 100 megaspore mother cells, since three, out of you megaspores degenerate in each case. |
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| 661. |
Nucellus embryo isA. amphimictic haploidB. amphimictic diploidC. apomictic haploidD. apomictic diploid |
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Answer» Correct Answer - C Nucellus embryo is apomictic haploid. Nucellus is a parenchymatous, haploid nutritive tissue of the ovule of phanerogams. The phenomenon of formation of embryo or new individual directly through asexual reproduction or adventitiously from a cell other than egg. i.e. nucellus, integuments, etc., is known as apomixis. Nucellus embryo is thus, known as apomictic embryo. |
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| 662. |
Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the otherA. HydrillaB. YuccaC. BananaD. Viola |
| Answer» Correct Answer - B | |
| 663. |
Double fertilization isA. fusion of two male gametes of a pollen tube with two different eggsB. fusion of one male gamete with two poalr nucleiC. fusion of two male gametes with one eggD. syngamy and triple fusion. |
| Answer» Correct Answer - D | |
| 664. |
Formation of gametophyte directly from sporophyte without meiosis is.A. aposporyB. apogamyC. parthenogenesisD. amphimixis |
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Answer» Correct Answer - A Apospory is the formation of gametophyte directly from sporophyte without forming spores and meiosis. The gametophytes formed through apospory are usually diploid. Apospory leads to polyploidy and hence, new species in bryophytes and pteridophytes. |
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| 665. |
The bilobed nature of an anther is very distinct in theA. Transverse sectionB. Longitudinal sectionC. Latitudinal sectionD. Both A and B |
| Answer» Correct Answer - A | |
| 666. |
Embryo sac develops from megaspore mother cell throughA. 1 meiosis and 2 mitosesB. 1 meiosis and 3 mitosesC. 2 meioses and 1 mitosisD. 2 meioses and 2 mitoses |
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Answer» Correct Answer - B Embryo sac develops from megaspore mother cell through 1 meiosis and 3 mitoses. |
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| 667. |
Match the options. A. a-4, b-3, c-1,d-2B. a-3,b-4,c-2,d-1C. a-1,b-2,c-3,d-4D. a-2,b-1,c-4,d-3 |
| Answer» Correct Answer - B | |
| 668. |
Even in absence of pollinating agents seed-setting is assured inA. CommelinaB. ZosteraC. SalviaD. Fig |
| Answer» Correct Answer - A | |
| 669. |
Embryo sac develops from megaspore mother cell throughA. two meiotic and two mitosis divisionsB. one meiotic and three mitosis divisionsC. two meitotic divisionsD. one meiosis and two mitotic divisions |
| Answer» Correct Answer - B | |
| 670. |
Which of the following options is correct ?A. Trasfer of pollen grains from the anther to the stigma of the same flower - AutogamyB. Transfer to pollen grains from the anther of one flower to the stigma of another flower of same plant-GeitonogamyC. Trasfer of pollen grains from the anther to the stigma of a genetically different plant of same species-XenogamyD. All of these |
| Answer» Correct Answer - D | |
| 671. |
In a flower, if the megaspore mother cell forms magaspores without undergoing meiosis and if one of the magaspores develops into an embryo sac, its nuclei would beA. haploidB. diploidC. a few haploid and a few diploidD. with varying ploidy |
| Answer» Correct Answer - B | |
| 672. |
In a flower, if the megaspore mother cell forms magaspores without undergoing meiosis and if one of the magaspores develops into an embryo sac, its nuclei would beA. HaploidB. DiploidC. a few haploid and few diploidD. With varying ploidy |
| Answer» Correct Answer - B | |
| 673. |
the process of formation of megaspores from the megaspore mother cell is calledA. MicrogametogenesisB. MicrosporogensisC. MegagametogenesisD. Megasporogenesis |
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Answer» Correct Answer - D The process of formation of megaspores from the megaspore mother cell is called megasporogenesis. |
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| 674. |
Megaspores are produced from megaspore mother cells afterA. meiotic divisionB. mitotic divisionC. formation fo thick wallD. differntitation |
| Answer» Correct Answer - A | |
| 675. |
Point of attachement of ovule to the funicile is known as:A. ChalazaB. MicropyleC. RaphaeD. Hilum |
| Answer» Correct Answer - D | |
| 676. |
The typical angiospermic stamen has two parts-the long and slender stalk called the ..a.., and the terminal generally bilobed structure called the .. B..A. a-pedicel, b-antherB. a-petiole, b-microsporangiaC. a- peduncle, b-pollen sacD. a-filament, b-anther |
| Answer» Correct Answer - D | |
| 677. |
The point of attachement of the stalk with the seed isA. HilumB. MicopyleC. TegmenD. Plumule. |
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Answer» Correct Answer - A The point of attachment of the stalk with the seed is hilum. |
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| 678. |
Stalk of the ovule is called:A. PeduncleB. PetioleC. PedicelD. Funicle |
| Answer» Correct Answer - D | |
| 679. |
Ovule is attached to the placenta by a stalk known asA. funicleB. petioleC. pedicelD. hilum |
| Answer» Correct Answer - A | |
| 680. |
In angiosperms, a mature male gametophyte is formed from a pollen mother cell throughA. 3 mitosisB. 1 meiosis and 2 metiosisC. 2 meiosisD. one meiosis |
| Answer» Correct Answer - B | |
| 681. |
Function of guiding and attracting pollen tube towards egg is done byA. egg cellB. filiform apparatusC. anitpodal cellD. polar nuclei |
| Answer» Correct Answer - B | |
| 682. |
The number of chromosomes in leaf tip cell of plant is 6. The number of choromosoms in each of the 4 cells of its pollen tetrad would beA. 3B. 6C. 12D. 24 |
| Answer» Correct Answer - A | |
| 683. |
Which type of association is found in between entompophilour flower and pollinating agent ?A. MutualismB. CommensalismC. CooperationD. Co-evolution |
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Answer» Correct Answer - A A plant and its pollinator have mutualistic relationship. The plant uses its pollinator to ensure cross-pollination while pollinator uses the plant as food. |
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| 684. |
In flowering plants archesporium gives rise toA. wall and the tapetumB. only tapetum and sporogenous cellsC. only the wall of the sporangiumD. both wall and the sporogenous cells |
| Answer» Correct Answer - D | |
| 685. |
In flowering plants archesporium gives rise toA. only tapetum and sporogenous cellsB. only the wall of the sporangiumC. both wall and the sporogenous cellsD. wall and the tapetum |
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Answer» Correct Answer - C The archesporial cells divide periclinally, cutting off primary parietal layer (forming wall later on) towards the outer side and primary sporogenous cells towards the inner side. The cells of the primary parietal layes divide by successive periclinal and anticlinal division to form concentric layers of pollen sac wall. |
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| 686. |
In flowering plants archesporium gives rise toA. only the wal of the sprorangiumB. both wall and the sprorogenous cellsC. wall and the tapetumD. only tapetum and sprorgenous cells |
| Answer» Correct Answer - B | |
| 687. |
Cross pollination isA. AutogamyB. AllogamyC. ChasmogamyD. Cleistogamy |
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Answer» Correct Answer - B Cross pollination is allogamy/xenogamy. |
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| 688. |
Intraspecific cross pollination isA. AutogamyB. GeitonogamyC. XenogamyD. Alloautogamy |
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Answer» Correct Answer - C Intraspecific cross pollination is xenogamy. |
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| 689. |
Anthesis is a phenomenon which refers to:A. Reception of pollen by stigmaB. Formationof pollenC. Development of antherD. Opening of flower bud |
| Answer» Correct Answer - D | |
| 690. |
Cleistogamy does not require anthesis becauseA. No pollination agent is requiredB. It assures heterozygosityC. It allows xenogamyD. It favours insect pollination |
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Answer» Correct Answer - A Cleistogamy does not require anthesis (opening of floral bud) because no pollination agent is required |
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| 691. |
Which of the folliwng statement is wrongs?A. pollen grains remain viable for several months because their outer covering is made of sprorpolleninB. no enzyme can degrade spororpolleninC. pollen grains are well repersented in fossil strata due to sprorpolleninD. pollenwall was cavities containing proteins |
| Answer» Correct Answer - A | |
| 692. |
Long ribbon like pollen grains are seen in someA. aquatic plantsB. wind pollinated grassesC. gymnospermsD. brid pollionated flowers |
| Answer» Correct Answer - A | |
| 693. |
Transfer of pollen grains (shed from the anther) to the stigma of a pistil is termedA. FertilisationB. Double fertilisationC. Pollen-pistil interactionD. Pollination |
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Answer» Correct Answer - D Transfer of pollen grains (shed from the anther) to the stigma of a pistil is termed pollination. |
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| 694. |
Given below are certain combinations. Select the correct ones. (i) Ceratophyllum - Epihydrophilly (ii) Maize - Anemophily (iii) Aristolochia - Zoophily (iv) Adansonia- Chiropterophily (v) Salvia - Hypohydrophily (vi) Arisaema (snake plant) - Malacophily (vii) Kigelia - EntomophilyA. (i), (ii), (iii), (vi)B. (i), (iii), (iv), (vi) , (vii)C. (ii), (iii), (iv), (vi)D. (ii), (iii), (iv), (vii) |
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Answer» Correct Answer - C Cerotophyllum shows hypohydrophily: Salvia shows entomophilyand Kigelia shows Chiropterophily. |
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| 695. |
In maize, aleurone layer develops in outermost region of:A. PericarpB. EpicarpC. TestaD. Endosperm |
| Answer» Correct Answer - D | |
| 696. |
In an embryo sac of a typical angiosperm there areA. Egg, synergids and secondary cellB. Egg, synergids, central cell and plar nucleiC. Egg, synergids, polar nuclei and antipodalsD. Egg, synergids and secondary wall |
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Answer» Correct Answer - C A typical embryo sac possesses egg, synergids, polar nuclei and antipodals. |
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| 697. |
In cereals, one or few outermost layers of the endosperm become highly specialised morphologically and physiologically and constitute the aleurone tissue. Which of the following statements regarding aleurone tissue (or aleurone cells) is incorrect ?A. Aleurone cells are characterised by the presence of thin walls and vacuolated cytoplasm with single small nucleus.B. Aleurone grains, rich in proteins are present in these cells.C. Aleurone grains present in aleurone cells ae closely associated with sphaerosomes.D. During seed germination, the reserve food of endosperm is digested by the activity of certain hydrolytic enzymes secreted by aleurone cells. |
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Answer» Correct Answer - A The aleurone cells are characterised by the presence of thick walls and non-vacuolated cytoplasm interconnected by plasmodesmata. The most prominent organelles of these cells are aleurone grains, followed by sphaerosomes. |
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| 698. |
Dioecious plants (papaya, date palm) preventA. Autogamy but not geitonogamyB. Geitonogamy but not autogamyC. Both autogamy and geitonogamyD. Neither autogamy nor geitonogamy |
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Answer» Correct Answer - C Dioecious plants (papaya, date palm) etc. prevents both autogamy and geitonogamy. |
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| 699. |
Why are date palm plants referred to as dioecious ? |
| Answer» Date palm are unisexual where male and female flowers are borne on different plants. Therefore , they are referred to as diosecious. | |
| 700. |
Who is author of book 'Inroduction to the Embryology' of AngiospermsA. P. MaheshwariB. M.S. SwaminathanC. K.C MehtaD. R. Mishra |
| Answer» Correct Answer - A | |