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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.
| 551. |
Vascular tissues in flowering plants develop fromA. phellogenB. pleromeC. peribelmD. dermatogen |
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Answer» Correct Answer - a Histogen theory for shoot apical meristem has been proposed by Hanstein (1870).it advocates that there are three distinct meristematic zones (layers) called dermatogen, periblem and plerome.the dermatogen is the outermost histogen giving rise to epidermis , periblem is the middle one producing the cortex and plerome is the innermost resulting in central cyclinder , (i,e. vascular tissue). Cork cambium (phellogen) is the secondary lateral meristem found in outer cortical region . its cells divide periclinally cutting off cells towards the outside (forming cork or phellem) and inside (forming secondary cortex or phelloderm). |
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| 552. |
The length of different internodes in a culm of sugarcane is variable becauseA. shoot apical meristemB. position of axillary budsC. size of leaf lamina at the node below each internodeD. Intercalary meristem |
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Answer» Correct Answer - d Intercalary meristem is present away from apical meristem in primary permanent tissue. It is present at the base of internodes , e.g. in family - Gramineae of at the base of leaves , e.g. Piius or at the base of node , e.g. Mentha. Intercalary meristem is responsible for increase in lenght. The shoot apical meristem present at the apisec of shoot , is self determining and autonomous organising centre. The primary growth and differentiation of primary tissues is entissues is entirely due to this meristem as it continuously divides giving rise to new cells . these are the apical meristems that increase the length of plant but not internodes variability. |
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| 553. |
Which one of the following is resistant actionA. Pollen exineB. Leaf cuticleC. CorkD. Wood fiber |
| Answer» Correct Answer - A | |
| 554. |
Vascular tissues in flowering plants develop fromA. PeriblemB. DermatogensC. PhellogenD. Plerome |
| Answer» Correct Answer - D | |
| 555. |
Vascular cylinder in dicot stems occurs in the form of distinctly separated vascular bundles. But, in some dicot stems, e.g. Linum, Lonicera, it appears to be a continuous cylinder becauseA. interfasciular region is not developed at allB. the interfascicular region is there, but its cells are not differentiable from the cells of vascular bundlesC. interfacicular region is extremely narrowD. continuous vascular cylinder differentiates since, the early stage of development |
| Answer» Correct Answer - D | |
| 556. |
Vascular bundles in a dicot stems are ………….. in outline.A. dumb-bell-shapedB. oval or roundedC. wedge-shapedD. polygonal |
| Answer» Correct Answer - C | |
| 557. |
Vascular bundles are arranged in two rings in the dicot stems ofA. HelianthusB. RicinusC. CucurbitaD. Aristolochia |
| Answer» Correct Answer - C | |
| 558. |
Sieve tubes are better suited for translocation, becauseA. bordered pitsB. no ends wallsC. broader lumen and perforated cross wallsD. no protoplasm |
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Answer» Correct Answer - c Sieve tubes function as the food conduvting elements of phloem which are elongated tubular chennels formed by end to end union of numerous cells . Seives tubes have broader lumen , thin walls. Septa present between sieve tube cells are called sieve plates, they possess a number of perforations called sieve pores or sieve pits. |
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| 559. |
A leaf primordium grows into the adult leaf lamina by means ofA. apical merstemB. lateral merstemC. marginal merstemD. at first by apicla meristem and later largely by marginal meristem |
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Answer» Correct Answer - d Apical meristem is presents at the tips of stems, roots and leaves , it takes part in initial growth or elongation of roots, stems and leaves. Marginal meristem or plate meristem has parallel layers of cells which divide anticlinally in two planes as in growing flat organs like - leaves. |
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| 560. |
Mechanical properties of sclerenchyma is due toA. celluloseB. ligninC. pectinD. cutin |
| Answer» Correct Answer - B | |
| 561. |
Concept envisaging three zones of cells in root and stem tips isA. Histogen theoryB. tunica corpus theoryC. Meristen theoryD. Munch hypothesis |
| Answer» Correct Answer - A | |
| 562. |
From the given set of statements chracterising the internal structure of dicot leaf, identify the incorrect one.A. Type of leaf-DorsiventralB. Mesophyll-Made up of palisade parenchyma and spongy parenchymaC. Bundle sheath-Made up parenchyma cellsD. Bulliform cells-Present on upper epidermis |
| Answer» Correct Answer - D | |
| 563. |
All given tissues are formed as a result of redifferentiation process, exceptA. PhellumB. PhellodermC. Secondary xylemD. Interfascicular cambium |
| Answer» Correct Answer - D | |
| 564. |
The length of different internodes in a culm of sugarcane is variable becauseA. Shoot apical meristemB. Position of axillary budsC. Intercalary meristemD. Size of leaf lamina at the node below each internode |
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Answer» Correct Answer - C Length of diffeent internodes in stem of sugarcane is variable due to intercalary meristem |
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| 565. |
Epiblema of roots is equivalent toA. pericycleB. endodermisC. epidermisD. stele. |
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Answer» Correct Answer - C Epiblema or piliferous layer (rhizodermis) is the outermost layer of young root which ahs thin-walled cells. Some of the cells give rise to root hairs which take part in the absroption of water and mineral salts. Epidermis is also outer most layer. therefore epiblema of root is equivlent to epidermis. |
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| 566. |
Epiblema is the name of the epidermis ofA. LeafB. StemC. Dictor rootD. Boht dicot and monocot roots |
| Answer» Correct Answer - D | |
| 567. |
Epiblema of roots is equivalent toA. pericycleB. endodermisC. epidermisD. stele |
| Answer» Correct Answer - C | |
| 568. |
Which of the following lack stomata in their epidermis (epiblema)?A. Dicot rootsB. Dicot stemsC. Monocot stemsD. Both (a) and (c ) |
| Answer» Correct Answer - A | |
| 569. |
Organisation of stem apex into corpus and tunica is determined mainly byA. planes of cell divisionB. regions of meristematic activityC. rate of cell growthD. rate of shoot tip growth |
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Answer» Correct Answer - a Tunica (outer zone of shoot apex) forms protoderm which through anticlinal divisions gives rise to epidermis of stem and leaves . Corpus is inner mass of meristem where cells undergo divisions in different planes to form procambium and ground meristem. |
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| 570. |
Match the following in column I with column II and choose the correct combination `{:(,"Column" I,,"Column" II,),(A.,"Xylem vessels",1,"Store food materials",),(B.,"Xylem trachieds",2,"Obliterated lumen",),(C.,"Xylem fibre",3,"Perforate plates",),(D.,"Xylem parenchyma",4,"Chisel-like ends",):}`A. A-4, B-3, C-2, D-1B. A-3, B-2, C-1, D-4C. A-2, B-1, C-4, D-3D. A-3, B-4, C-2, D-1 |
| Answer» Correct Answer - D | |
| 571. |
A narrow layer of thin-walled cells found between phloem/bark and wood of a dicot isA. cork cambiumB. vascular cambiumC. endodermisD. pericycle |
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Answer» Correct Answer - b Vascular cambium is formed by strips of fascicular cambium and interfascicular cambium. It consist of narrow layer of thin walled cells found between phloem and xylem tissues. Vascular cambium help in secondary growth in dicot root and stem |
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| 572. |
Bordered pits are found inA. sieve cellsB. vessel wallC. companion cellsD. sieve tube wall |
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Answer» Correct Answer - b Pits are the depressions or cavity formed in the cell wall that are found in the sclerenchyma, thick walled parenchyma cells and the tracheary elements , (i.e. vessels and tracheids). Simple pits are uniforms while bordered pits are the flask shaped depressions. |
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| 573. |
Plants showing anomalous secondary growth includeA. DraceanaB. gingerC. wheatD. sunflower |
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Answer» Correct Answer - a Secondary growth in monocotyledons is rather rare , it is commonly seen in woody monocotyledons such as exceptionally large secondary growth in thickness occurs that begins with the formation of secondary meristematic tissue - the cambium , in the parenchyma outside the primary bundles . moreover , cork in Dracaena appears in seriated bands without the formation of cork cambium (phellogen) and is known as storied cork. |
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| 574. |
Match the following in column I with column II and choose the correct combination `{:(,"Column" I,,"Column" II,),(A.,"Xylem vessels",1,"Store food materials",),(B.,"Xylem trachieds",2,"Obliterated lumen",),(C.,"Xylem fibre",3,"Perforate plates",),(D.,"Xylem parenchyma",4,"Chisel-like ends",):}`A. `a to iii, b to ix, c to ii, d to i`B. `a to iv, b to iii, c to ii, d to i`C. `a to iii, b to i, c to iv, d to iii`D. `a to i, b to ii, c to iii, d to iv` |
| Answer» Correct Answer - A | |
| 575. |
Bordered pits are elongated transversely and arranged in vertical series. The pattern is known asA. Scalariform pittingB. Intervascular pittingC. Reticulate thickeningD. Oblique pitting |
| Answer» Correct Answer - A | |
| 576. |
Which of the following is known as woodA. Primary xylemB. Secondary xylemC. Secondary phloemD. Cambium |
| Answer» Correct Answer - B | |
| 577. |
Find the correct match. `{:(,"Column I",,"Column II"),((a),"Brachysclereids",(i),"Rod cells"),((b),"Macrosclereids",(ii),"Girt cells"),((c),"Bast fibres",(iii),"Cotton fibers"),((d),"Asterosclereids",(iv),"Nelumbo"):}`A. `a to ii, b to i, c to v, d to iii`B. `a to ii, b to i, c to v, d to iv`C. `a to i, b to ii, c to v, d to iv`D. `a to ii, b to i, c to iv, d to v` |
| Answer» Correct Answer - B | |
| 578. |
Sieve tubes are better suited for translocation, becauseA. Possess a broader lumen and perforted cross wallsB. Are broader than longerC. Possess bordered pitsD. Possess no end walls |
| Answer» Correct Answer - A | |
| 579. |
Bordered pits are found inA. MonocotyledonsB. GymnospermsC. DicotyledonsD. All of these |
| Answer» Correct Answer - B | |
| 580. |
How is the study of plant anatomy useful to us? |
| Answer» The study of plant anatomy helps us to understand the structural adaptations of plants with respect to diverse environmental conditions. It also helps us to distinguish between monocots, dicots, and gymnosperms. Such a study is linked to plant physiology. Hence, it helps in the improvement of food crops. The study of plant-structure allows us to predict the strength of wood. This is useful in utilising it to its potential. The study of various plant fibres such as jute, flax, etc., helps in their commercial exploitation. | |
| 581. |
The tip of the root apical meristem is proceeded by root pocket inA. BrassicaB. EichhorniaC. PetuniaD. Wheat |
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Answer» Correct Answer - B Eichhornia (water hycianth) is a hydrophytes. So root pocket present instead of root cap. |
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| 582. |
Tunica differs from corpus inA. PositionB. Rate of growthC. Plane of divisionD. Region of activity |
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Answer» Correct Answer - C Plane of division in tunica is anticlinal and in corpus it is periclinal. |
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| 583. |
What is periderm? How does periderm formation take place in dicot stem? |
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Answer» Periderm is composed of the phellogen, phellem, and phelloderm. During secondary growth, the outer epidermal layer and the cortical layer are broken because of the cambium. To replace them, the cells of the cortex turn meristematic, giving rise to cork cambium or phellogen. It is composed of thin-walled, narrow and rectangular cells. Phellogen cuts off cells on its either side. The cells cut off toward the outside give rise to the phellem or cork. The suberin deposits in its cell wall make it impervious to water. The inner cells give rise to the secondary cortex or phelloderm. The secondary cortex is parenchymatous. |
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| 584. |
The cross-section of a plant material showed the following features when viewed under the microscope (a) The vascular bundles were radially arranged (b) Four xylem strands with extrach condition of protoxylem. To which organ should it be assigned ? |
| Answer» Root is the organ which shows the features given in the question. Vascular bundles are present on separate radii thus called radical arrangement. Protoxylem is towards periphery of root thus making extarch condition. | |
| 585. |
Which is not true for monocot stem ?A. Sclerenchymatous hypodemisB. Presence of water cavity in pithC. Conjoint collateral closed vascular bundlesD. Presence of bundle sheath |
| Answer» Correct Answer - B | |
| 586. |
A collateral vascular bundle is thatA. Which has either phloem strand or xylem strndB. In which both xylem and phloem are present at the same radiusC. In which both xylem and phloem are present with the xylem towards centreD. In which both xylem and phloem are present at different radii |
| Answer» Correct Answer - c | |
| 587. |
In a sicot root, with tetrach vascular bundles, lateral roots arise from the pericycle the twoA. Opposite to phloemB. Opposite to protoxylemC. In between protoxylem and phloemD. Anwhere |
| Answer» Correct Answer - B | |
| 588. |
Which one of the following is present in the stem but not in the root ?A. CuticleB. PeridermC. MeristemD. Secondary growth |
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Answer» Correct Answer - A Cuticle is present in the stem but not in the root. |
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| 589. |
Read the different components from (A) to (D) in the list given below and tell he correct order of the components with reference to their arrangement from outer side to inner side in a woody dicot stem (A) Secondary cortex , (B) Wood (C)Secondary phloem , (D) PhellemA. Secondary cortexB. WoodC. Secondary phloemD. Phellem |
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Answer» Correct Answer - B In a woody dicot stem The correct order is: Phellem- secondary cortex - secondary phloem - wood. |
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| 590. |
The sclerenchymatous sclerieds are found inA. Fruit walls of legumesB. Pulp of fruits like, guava pear and sapota, leaves of teaC. See coat of nutsD. All of the above |
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Answer» Correct Answer - B The sclenchymatous sclerieds are found in pulp of fruits like , guava pear and sapota, leaves of tea: fruit wall of nuts land seed coat of legumes |
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| 591. |
In a woody dicotyledonous tree, which of the following parts wall mainly consist of primary tissuesA. all partsB. stem and rootC. fruits, flowers and leavesD. shoot tip and root tip |
| Answer» Correct Answer - D | |
| 592. |
Undifferentiated ground tissue characteristically occurs inA. Zea mays stemB. Cucurbita stemC. Helianthus stemD. Helianthus root |
| Answer» Correct Answer - A | |
| 593. |
In a woody dicotyledonous tree, which of the following parts wall mainly consist of primary tissuesA. All partsB. Stem and rootC. Flowers , fruits and leavesD. Shoot tips and root tipe |
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Answer» Correct Answer - d Primary tissues are those meristematic tissues which are derved directly from embryonal tissues. E.g. shoot apex and root apex. |
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| 594. |
Open vascular bundles are those whichA. are surrounded by pericycle but no endodermisB. are capable of producing secondary xylem and phloemC. are not surrounded by pericycleD. possess conjuctive tissue between xylem and phloem |
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Answer» Correct Answer - B Open vascualr bundles are those which are capable of porducing secondary xylem and phloem. |
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| 595. |
The primary growth is affected byA. Primary cambiumB. Apical meristemsC. CambiumD. Secondary cambium |
| Answer» Correct Answer - B | |
| 596. |
cortex lies betweenA. Endodermis and pithB. Endodermis and vascular bundleC. Epidermis and steleD. Pericycle and endodermis |
| Answer» Correct Answer - C | |
| 597. |
A: In monocot roots, pericyle gives rise to lateral roots and cork cambium. R: It has tetrach vascualr bundles usually.A. If both Assertion & Reason are true and the reason is the correct expalanation of the assertion. Then mark (1).B. If Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)C. If Assertion is true statement but Reason is false, then mark (3).D. If both Assertion and Reason are false statements, then mark (4) |
| Answer» Correct Answer - D | |
| 598. |
Radial conduction of water takes place byA. VesselsB. Vessel and trachiedsC. PhloemD. Ray parenchyma cells |
| Answer» Correct Answer - D | |
| 599. |
The histogen layer present at the apex of the root tip is calledA. Dermatogen procambiumB. ProcambiumC. CalyptrogenD. Plerome |
| Answer» Correct Answer - A | |
| 600. |
Parenchmatous tissue is characterized by theA. Presence of uniform tickeningB. Presence of thickening in the cornersC. Presence of intercellular spaces D. Presence of lignified walls |
| Answer» Correct Answer - C | |