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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. |
in monocotsA. Leaves have reticulate venationB. Stems annual ringsC. Seeds have two stronge organsD. Stems have scattered conducting strands |
| Answer» Correct Answer - D | |
| 752. |
The bicollateral vascular bundle is the characteristic feature of plants belonging to the familyA. CruciferaeB. LiliaceaeC. CucurbitaceaeD. Malvaceae |
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Answer» Correct Answer - C Bicollateral : In such vascular bundles there are two patches of phloem one on each side of xylem. In such a vascular bundles there are two strips of cambium one on each side of xylem. Cucurbitaceae (e.g., Cucurbita). |
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| 753. |
vascular bundle of monocot isA. SctteredB. ClosedC. EndarchD. All the above |
| Answer» Correct Answer - D | |
| 754. |
Assertion: The ground tissue system forms the main bulk of the plant It is divided into three zones - cortex pericycle and pith Reason: In leaves, the ground tissue consists of thin walled chloroplast containing cells and is called mesophyll |
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Answer» Correct Answer - D The ground tissue systems forms sthe manin bulk of the plant. It is divided in to three zones - cortex, pericycle and pith. In leaves, the ground tissue consists of thin walled chloroplast containing cells and is called mesophyll. |
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| 755. |
Assertion: For a better understanding of tissue organisation ofroots stems and leaves it is convenient to study the tansverse sections of the matures zones of these organs Reason: The vertical section of a dorisventral leaf through the lamina shows three main parts , namely epidermis, mesophyll and vascular system |
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Answer» Correct Answer - B For a better understanding of tissue organisation of roots, and leaves it is vconveninent to study the transverse secotions of the mature zones of these organs. The vertical section of dorsiventral leaf through the lamina shows threee main parts, namely, epidermis, mesophyll and vascular system. |
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| 756. |
The distinct cavities (lacunae) found in a mature vascular bundle of maize stem are formed due toA. Disruption of protoxylem as well as lysis of adjacent xylem parenchymaB. Disruption of protoxylem aloneC. Lysis of xylem parenchymaD. Dissolution of common wall between a few metaxylem elements and their consequent coaliton |
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Answer» Correct Answer - B In a completely mature vascular bundle a schizolysigenous cavity is formed by disintegration of protoxylem. These cavities are filled with water. |
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| 757. |
Inulin and raphide crystals are which type of plant products ?A. ExcretoryB. InorganicC. RespiratoryD. Reserve material |
| Answer» Correct Answer - D | |
| 758. |
Which tissue is derived from tunicaA. EpidermisB. EndodermisC. pericycleD. Vascular tissue |
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Answer» Correct Answer - A Tunica is outermost layer and it becomes change into epidermis. |
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| 759. |
The tissue system derived from protoderm isA. epidermal tissue systemB. ground tissue systemC. secretory tissue systemD. vascular tissue system |
| Answer» Correct Answer - A | |
| 760. |
An multilayered epidermis is not found in the leaves ofA. HelianthusB. NeriumC. BignoniaD. Peperomia |
| Answer» Correct Answer - A | |
| 761. |
In dicot stems, cambium present between primary xylem and primary phoem isA. fascicular cambiumB. intrafascicular cambiumC. interfascicular cambiumD. both a and b |
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Answer» Correct Answer - D Intrafascicular or fascicular combium is present in the form of a narror strip of primary meristematic cells in between the phloem and the xylem of a vascular bundle. Intrafascicular cambium is primary lateral meristem which helps in increases girth of the plant. |
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| 762. |
Assertion: Secondary grouwth usualy occurs in dicotyledonous stems. Reason: The vascular cambium present between xylem and phloem possesses the ability to form secondary xylemand secondary phloem respectively.A. If both assertion and reason are true and reason is the correct explanantion of assertionB. if both assertion and reason are true but reason is not the correct explanation of assertion.C. if assertion is true but reason is false.D. if both assertion and reason are false. |
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Answer» Correct Answer - A Dictyledonous stems usually show secondary growth in thickness, which id due to the activity of vascular cambium and cork cambium. Vascular cambium is present between phloem and xylem. Such vascular bundles because of the presence of cambium prossess the ability to form secondary xylyem and phloem tissues, and hence exhibit secondary growth. |
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| 763. |
Assertion: The wood is actually secondary xylem. Reason: Secondary growth occurs in most of the monocot roots and stems.A. If both assertion and reason are true and reason is the correct explanantion of assertionB. if both assertion and reason are true but reason is not the correct explanation of assertion.C. if assertion is true but reason is false.D. if both assertion and reason are false. |
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Answer» Correct Answer - C Secondary growth occurs in most of the dicotyledonous roots and stems. |
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| 764. |
Assetion : collenchyma, sclerenchyma and xylem provide mechanical suppot to the plant body ltbvrgt Reason: Their cell walls are thick and lignified |
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Answer» Correct Answer - c Collenchyma, sclernchyma and xylem provides mechanical support to the plant parts. Cell wall is thick and lignified in sclerenchyma and xylem but not in collenchyma. |
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| 765. |
Youngest layer of secondary xylem in wood of dicot stem is located justA. Between pith and primary xylemB. Just outside vascular cambiumC. Just inside vascular cambiumD. Just inside cork cambium |
| Answer» Correct Answer - C | |
| 766. |
Identify the permanent tissues shown in the following figures . A. A-Collenchyma, B-Parenchyma, C-SclerenchymaB. A-Sclerenchyma, B-Collenchyma, C-ParenchymaC. A-Collenchyma, B-Sclerenchyma, C-ParenchymaD. A-Parenchyma, B-Collenchyma, C-Sclerenchyma |
| Answer» Correct Answer - D | |
| 767. |
What is the fate of primary xylem in a dicot root showing extensive secondary growth?A. It is retained in the centre of the axisB. It gets crushedC. May or may not get crushedD. It gets surrounded by primary phloem |
| Answer» Correct Answer - A | |
| 768. |
Assertion : In angiosperms the conduction of water is more efficient because their xylem has vessels Reason: conduction of water by vessel elements is and active process with energy supplied byv xylem parenchyma rich in mitochondriaA. If both assertion and reason are true and the reason is a corect explanation of the assertionB. If both assertion and reason are true but reason is not a correct explanation of the assertionC. If the assetion is true but reason is falseD. If both the assertion and reason are false |
| Answer» Correct Answer - D | |
| 769. |
transport proteins of endodermal cells are control point where a plant adjusts the quantity and types of solutes that reach the xylem. Root endodermis is able to actively transport ions in one direaction only becaouse of the layer of .A. actinB. ligninC. suberinD. cellulose |
| Answer» Correct Answer - C | |
| 770. |
Assetion : There are different types of wood on the basisi of their comp[osition and time of production Reason: The wood is actually a secondary xylem. |
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Answer» Correct Answer - B There are different types of wood on the basis of their compositon and time of porduction. The wood is acturally secondary xylem. |
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| 771. |
The following diagrams show the types of secondary thickenings in the xylem vessels. Identify the types labelled from A to F. Choose the correct option from those given A. A=spiral, B=annular, C=reticulate, D=scalariform, E=potted with border, F=pitted simpleB. A=annular, B=spiral, C=scalariform, C=reticulate, E=pitted with border, F=pitted simpleC. A=annular, B=spiral, C=scalariform, D=reticulate, E=pitted simple, F=pitted with borderD. A=spiral, B=annular, C=scalariform, D=reticulate, E=pitted with border, F=pitted simple |
| Answer» Correct Answer - B | |
| 772. |
Palisade parenchyma is absent in leaves ofA. SorghumB. MustardC. SoybeanD. Gram |
| Answer» Correct Answer - A | |
| 773. |
Palisade parenchyma is absent in leaves ofA. MustardB. SoybeanC. GrainD. Sorghum |
| Answer» Correct Answer - D | |
| 774. |
Palisade parenchyma is absent in leaves ofA. SorghumB. mustardC. soybeamD. gram |
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Answer» Correct Answer - A Sorghum (family-Poaceae) is a monocot plant. The leaves of monocot do not contain palisade parenchyma, because the mesophyll of monocot leaf is not differentiated into palisade and spongy parenchyma, all being thin-walled, chlorophyllous and irreegularly compactly arranged with fewer intercellular spaces. |
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| 775. |
Identify the vascular bundles given in the following figures . A. A-Closed vascular bundle, B-Open vascular bundleB. A-Radial vascular bundle, B-Open vascular bundleC. A-Amphivasal vascular bundle , B-Amphicribral vascular bundleD. A-Amphicribral vascular bundle, B-Amphivasal vascular bundle |
| Answer» Correct Answer - A | |
| 776. |
Identify the various types of xylem shown in the following figures. A. A-Xylem tracheids, B-Xylem vessels, C-Xylem parenchyma, D-Wood fibresB. A-Xylem vessels, B-Xylem parenchyma, C-Xylem tracheids, D-Wood fibresC. A- Xylem parenchyma, B-Xylem tracheids, C-Xylem vesels, D-Wood fibresD. A-Xylem vessels, B-Wood fibres, C-Xylem tracheids, D-Xylem parenchyma |
| Answer» Correct Answer - A | |
| 777. |
heart wood differs from sapwood inA. presence of rays and fibresB. absence of vessels and parenchymaC. having dead and non-conducting elementsD. being susceptible to pests and pathogens |
| Answer» Correct Answer - C | |
| 778. |
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem isA. MaturingB. ElongatingC. WideningD. Differentiating |
| Answer» Correct Answer - A | |
| 779. |
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem isA. ElongatingB. WideningC. DifferentiatingD. Maturing |
| Answer» Correct Answer - D | |
| 780. |
heart wood differs from sapwood inA. Being susceptible to pests and pathogensB. Presence of rays and fibresC. Absence of vessels and parenchymaD. Having dead and non-conducting elements |
| Answer» Correct Answer - D | |
| 781. |
heart wood differs from sapwood inA. Being susceptible to pests and pathogensB. Presence of rays and fibresC. Absence of vesseles and parenchymaD. Having dead and non-conducting elements |
| Answer» Correct Answer - D | |
| 782. |
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem isA. WideningB. DifferentiatingC. MaturingD. Elogating |
| Answer» Correct Answer - B | |
| 783. |
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem isA. maturingB. elongatingC. wideningD. deifferentiating |
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Answer» Correct Answer - C Vessels or tracheae are made up of a row of cells, placed one above the other, with their intervening walls absent or variously pored. The walls of vessels are lignified and hard, but not very thick. The cell cavity or the lumen is wide. The thickning may be annular, spiral, sclariform, recticulate and pitted. |
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| 784. |
heart wood differs from sapwood inA. being susceptible ot pests and pathogensB. presence of rays and fibresC. absence vesselsand prenchymaD. having dead and non-conducting elements |
| Answer» Correct Answer - D | |
| 785. |
Palisade parenchyma is absent in leaves ofA. GramB. SorghumC. MustardD. Soybeen |
| Answer» Correct Answer - B | |
| 786. |
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem isA. DifferentiatingB. MaturingC. ElongatingD. Widening |
| Answer» Correct Answer - B | |
| 787. |
heart wood differs from sapwood inA. Presence of rays and fibersB. Absence of vessels and parenchymaC. having dead and non-conducting elementsD. Being susceptible to pests and patogens |
| Answer» Correct Answer - C | |
| 788. |
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem byA. Position of protoxylemB. Absence of secondary xylemC. Absence of sencondary phloemD. Presence of cortex |
| Answer» Correct Answer - A | |
| 789. |
Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem byA. absence of secondary xylemB. absence of secondary phloemC. presence of cortexD. position of protoxylem |
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Answer» Correct Answer - d In dicotyledonous root , the condition of xylem is exarch as the protoxylem is away from the centre and metaxylem is towards the centre . In dicotyledonous stem , (e.g .Cucurbita), the condition of xylem is endarch as the metaxylem is away from the centre and protoxylem is towards the centre. |
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| 790. |
In kranz anatomy, the bundle sheath cells haveA. thin, walls many intercellular spaces and no chloroplastsB. thick walls, to intecellular spaces and large numbe of chloroplastsC. thin walls, no intecellular spaces and several chloroplastsD. thick walls many intercellular spaces and few chloroplasts |
| Answer» Correct Answer - B | |
| 791. |
The trichomes may be branhed or unbranched and soft or stiff.They may even by secreatory .The trichomes hep inA. loss of water due to transpirationB. absorpiton of water and mineralsC. preventivng water loss due to transpirationD. transpiration and gaseous exchange |
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Answer» Correct Answer - C The trichomes may be branched or unbranched and soft or stiff. They may even bvy secretory. The trichomes help in proiventing water loss ldue to transpiration |
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| 792. |
Identify the correct pair of statements. I. Pericycle is parenchymatous in dicot root but sclerenchymatous in mature monocot root. II. Pericycle of booth dicot and monocot roots produces lateral roots during secondary growth. III. All cells in endodermis of dicot root are passage cells. IV. Xylem is produced in centripetal manner in roots of fruit bearing plants.A. II and IIIB. III and IVC. I and IID. II and IV |
| Answer» Correct Answer - D | |
| 793. |
Kranz anatomy is found inA. MonocotsB. DicotsC. Both (a) and (b)D. None of these |
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Answer» Correct Answer - C Kranz type anatomy accurs in both monocol leaves (e.g.,Sugarcane, Maize and Sorghum etc.) and some dicot leaves (e.g., Amaranthus-edulis, Atriplex rosea etc.) |
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| 794. |
Which of the following is not a characteristic feature of the anatomy of dicotyledonous rootA. Radial vascular bundlesB. Secondary growthC. Pith little or absentD. Vascular bundles 15-20 |
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Answer» Correct Answer - D In dicots vascular bundles are 2 to 6. |
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| 795. |
Assertion : Apical and intercalary meristems contribute to the growth in length, while the lateral meristems bring increase in girth in maize. Reason : Apical and intercalary meristems always increase the height of plants.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 the Assertion.C. If Assertion is true, but Reason is false.D. If Assertion is false, but Reason is true. |
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Answer» Correct Answer - D Apical and intercalary meristems always increase in the height of plant and lateral meristem, it is responsible for secondary growth (increase in girth), but secondary growth does not occur in monocots, e.g. maize. |
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| 796. |
Assertion: The quiescent centre acts as a reservoir of relatively resistant cells, which constitute a permanent source of active initials. Reason: The cells of the inactive region of quiescent centre become active, when the previous active initials get damaged.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 the Assertion.C. If Assertion is true, but Reason is false.D. Both Assertion and Reason are false |
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Answer» Correct Answer - A Quiescent centre is found in the centre of the root apex. Cell divisions are very few in the quiescent centre. Quiescent centre may function as reserve meristem. |
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| 797. |
When the vascular cambium is present between the xylem and phloem, the vascular bundle is calledA. closedB. openC. endarchD. exarch |
| Answer» Correct Answer - B | |
| 798. |
Assertion : In collateral vascular bundles phloem is situated toward inner side. Reason : In monocot stem, cambium is present .A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the 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 In collateral vascular bundles phloem is situated towards outer side and xylem toward inner side and both are found on same radii, but in monocot stem vascular bundle are closed , i.e., cambium is absent. |
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| 799. |
Tracheids differ from other tracheary elements inA. having casparian stripsB. being imperforateC. lacking nucleusD. being lignified |
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Answer» Correct Answer - b Tracheids and vessels both are called tracheary elements because their main function is conduction of sap . Tracheids differ from other trachaery elements in being imperforate . Tracheids are the specific cells which have pits to support upwards and lateral conduction of water sap. Tracheid are comparatively short and single cell, while vessels have more than one cell and up to 10 cm long. |
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| 800. |
Age of tree can be estimated byA. its height and girthB. biomassC. number of annual ringsD. diameter of its heartwood |
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Answer» Correct Answer - c Age of a tree can be estimated by counting the number of annual rings . This study is known as dendrocronology . The two kinds of woods that appear as alternate concentric rings constitute an annual ring heartwood comprises dead elements with highly lignified walls that given mechanical support to the stem . the height and girth of a tree increases due to the activity of vascular cambium. |
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