InterviewSolution
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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.
| 51. |
Assertion : Growth rings are also called as annual rings. Reason : Generally growth ring is formed in each yearA. 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 - A The activity of the cambium is commonly periodic in the temperate regions and the xylem produced during one growth period constitutes a growth layer. In transverse sections of stems and roots, autumn wood (summer wood) and spring wood appear in the form of distinct concentric circle known as the annual rings. Spring wood circle and autumn wood circle constitute an annual rings. Like this, year after year, such rings in the oldest part of the tree corresponds to its age. |
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| 52. |
The annual rings are formed due toA. Uniform environmental conditionsB. Non-uniform environmental conditions.C. Absence of secondary growthD. Absence of primary growth |
| Answer» Correct Answer - b | |
| 53. |
Annual growth rings are formed due to activityA. Extrastelar cambiumB. Intrastelar cambiumC. Interstelar cambiumD. Both (b) and (c) |
| Answer» Correct Answer - D | |
| 54. |
Secondary cortex is also known asA. PhellemB. PhellodermC. PhellogenD. Bark |
| Answer» Correct Answer - B | |
| 55. |
In the primary tissues of the stem, the cambium separating xylem and phloem is calledA. ProcambiumB. Fascicular cambiumC. Cork cambiumD. Interfascicular cambium |
| Answer» Correct Answer - B | |
| 56. |
A component of xylem isA. Sieve tubeB. Medullary raysC. SclereidsD. Tracheid |
| Answer» Correct Answer - D | |
| 57. |
A distinguishing feature of comanion cells is that they arise from the same initial from which arisesA. phloem parenchymaB. best fibreC. sieve tubeD. cambium |
| Answer» Correct Answer - C | |
| 58. |
Statement : While observing transvers sections of two steams, the anatiomical characters were recorded as under :A. Vascular bundles conjoint with fibrous bundle sheath.B. Vascular bundles conjoint without fibrous bundle sheath.C. Vascular bundles collateral and closed.D. Vascular bundles collateral and open. |
| Answer» Correct Answer - C | |
| 59. |
The distinguishing anatomical features of stem are that they haveA. multicellular haris, exarch xylem and exogenous lateral branchedB. multicellular haris, endarch xylem and exogenous lateral branchedC. unicellular hairs, xylem and exogenous lateral branchesD. multicellular hairs, endarch xylem and endogenous lateral branches |
| Answer» Correct Answer - B | |
| 60. |
In a mature dicot stem which has undergone seconday growth, youngest layer of secondary xylem is situatedA. in between pith and primary xylemB. just outside the vascular cambiumC. just inner to the vascular cambiumD. just inner to the phellogen. |
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Answer» Correct Answer - C The cambial ring present between primary xylem and primary phloem becomes active and begins to cut of new cells, both towards the inner and the outer sides. The cells cut off towards pith mature into seondary xylem and the cell cut off towards periphery mature into secondary phloem. |
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| 61. |
In the endodermis of root he passage cells haveA. thick walls with casparian stripsB. thick walls without casparian stripsC. thin walls with casparian stripsD. thin walls without casparian strips |
| Answer» Correct Answer - C | |
| 62. |
After the commencement of secondary growth in dicot stem, the primary xylem would be obseved to occupy a position on theA. inner side of secondary xylemB. inner side of secondary phloemC. outer side of secondary xylemD. outer side of secondary phloem |
| Answer» Correct Answer - A | |
| 63. |
Which of the following is absent in the primary and secondary structure fo stem of PinusA. Seive tubesB. Mucilage ductC. Companion cellsD. Phloem parenchyma |
| Answer» Correct Answer - C | |
| 64. |
Which of the following tissue is present in the leaves of Pinus and serve to conduct water and foodA. XylemB. PhloemC. Transfussion tissueD. Conducting tissue |
| Answer» Correct Answer - C | |
| 65. |
Eustele condition is found in the stem ofA. dicotsB. monocotsC. fernsD. pteridophytes |
| Answer» Correct Answer - A | |
| 66. |
Which of the following tissue provides mechanical support of the growing parts of the plant such as young stem and petiole of a leafA. ParenchymaB. CollenchymaC. SclerenchymaD. Aerenchyma |
| Answer» Correct Answer - C | |
| 67. |
pericycle of roots producesA. mechanical supportB. lateral merstemC. vascular bundlesD. adventitious buds |
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Answer» Correct Answer - b In roots , pericycle lies below endofermis and is made of one or more layers of parenchymatous cells . Pericycle gives rise to lateral roots , root branches of vascular cambium and whole of cork cambium. |
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| 68. |
vascular cambium producesA. primary xylem and primary phloemB. secondary xylem and secondary phloemC. primary xylem and secondary phloemD. secondary xylem and primary pholem |
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Answer» Correct Answer - b Vascular cambium is formed by fascicular and interfascicular cambium . It leads to secondary growth in dicot roots and dicot stems . Cells of vascular cambium , known as fusiform initially produce secondary phloem on the outside and secondary xylem on the inner side. Youngest xylem layer occur inner to vascular cambium while oldest layer of secondary xylem is found outside the primary xylem or towards pith . In case of phloem lies just outside the vascular cambium while oldest layer is towards outside , inner to primary phloem. |
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| 69. |
For union between stock and scion in grafting which one is the first to occur ?A. Formation of callusB. Production of plasmodesmataC. Differentiation of new vascular tissuesD. Regeneration of cortex and epidermis |
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Answer» Correct Answer - a In grafting , cambium bearing shoot (scion) of one plant is joined to cambium bearing stump (root system= stock) of related plant through different union like tongue grafting , wedger grafting , etc. the union of scion and undifferentiated mass of actively dividing cells known as callus. |
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| 70. |
Seet the following figures and identify the type of simple tissue indicated by A, B, C and D A. A-Collenchyma , B-Parenchyma, C-Sclereid (Sclerenchyma), D-Fibre (Sclerenchyma)B. A-Parenchyma, B-Collenchyma, C-Sclereid (Sclerenchyma), D-Sclereid (Sclerenchyma)C. A-Collenchyma, B-Parenchyma, C-Fibre ( Sclerenchyma), D-Sclereid (Sclerenchyma)D. A-Parenchyma, B- Collenchyma, C-Fibre (sclerenchyma ), D- Sclereid (Sclerenchyma) |
| Answer» Correct Answer - D | |
| 71. |
Identiy the simple tissue from the followingA. ParenchymaB. XylemC. EpidermisD. Phloem |
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Answer» Correct Answer - A Parenchyma is a simple permanent tissue found in plants and, xylem and phloem are complex permanent tissues. Epidermis is a part of epidermal tissue system. |
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| 72. |
Match the following Columns . A. `{:(A,B,C,D,E),(4,5,2,1,3):}`B. `{:(A,B,C,D,E),(5,3,1,2,4):}`C. `{:(A,B,C,D,E),(4,5,1,2,3):}`D. `{:(A,B,C,D,E),(2,5,3,4,1):}` |
| Answer» Correct Answer - C | |
| 73. |
Match the following Columns. A. `{:(A,B,C,D),(5,4,3,1):}`B. `{:(A,B,C,D),(4,3,1,2):}`C. `{:(A,B,C,D),(4,1,3,2):}`D. `{:(A,B,C,D),(4,3,2,1):}` |
| Answer» Correct Answer - B | |
| 74. |
Match the following Columns. A. `{:(A,B,C,D),(3,4,1,2):}`B. `{:(A,B,C,D),(1,2,3,4):}`C. `{:(A,B,C,D),(3,2,4,1):}`D. `{:(A,B,C,D),(3,2,1,4):}` |
| Answer» Correct Answer - A | |
| 75. |
Match the following Columns. A. `{:(A,B,C,D,E),(1,3,5,2,4):}`B. `{:(A,B,C,D,E),(3,1,2,5,4):}`C. `{:(A,B,C,D,E),(2,4,5,1,3):}`D. `{:(A,B,C,D,E),(5,4,3,2,1):}` |
| Answer» Correct Answer - B | |
| 76. |
Vascular cambium is a meristematic layer that cuts offA. Primary xylem and primary pholemB. Xylem vessels and xylem tracheidsC. Primary xylem and secondary xylemD. Secondary xylem, secondary pholem and medullary rays |
| Answer» Correct Answer - D | |
| 77. |
Meristematic tissue in vascular bundle isA. PhellemB. ProcambiumC. Interfasicular cambiumD. Fasicular cambium |
| Answer» Correct Answer - D | |
| 78. |
Histogen theory is more applicable forA. Root apexB. Shoot apexC. Meristematic tissueD. None of these |
| Answer» Correct Answer - C | |
| 79. |
Apical cell theory is applicable toA. Algae, bryophytes and gymnospermsB. Angiosperms onlyC. Pteriodphytes and angiospermsD. Algae, bryophytes and pteriodophytes |
| Answer» Correct Answer - D | |
| 80. |
At maturity the sieve plates become impregnated withA. celluloseB. pectinC. suberinD. callose |
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Answer» Correct Answer - D Sieve plates are formed by two adjoining end walls of neighbouring sieve elements of sieve tube of phloem. At maturity, these become impregnated with callose pad, which may be seasonal callose (for only limited unfavourable period) or definitive callose (formed permanently in functionless old sieve tubes). |
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| 81. |
At maturity the sieve plates become impregnated withA. CelluloseB. SuberinC. CalloseD. Lignin s |
| Answer» Correct Answer - C | |
| 82. |
At maturity which of the following is enucleate ?A. Palisade cellB. Cortical cellC. Sieve cellD. Companion cell |
| Answer» Correct Answer - C | |
| 83. |
The central lumens are obliterated inA. Xylem fibresB. Pholem parenchymaC. Xylem parenchymaD. Sieve tubes |
| Answer» Correct Answer - A | |
| 84. |
The vascular bundle present in the midrib of a dicot leaf isA. the largest of allB. smallest of allC. equal in size to othersD. radial |
| Answer» Correct Answer - A | |
| 85. |
Xylem fibres posses obliterated central lumen due to very thick walls. This helps to perform the function ofA. ConductionB. Storage of foodC. Mechanical supportD. Both (2) and (3) |
| Answer» Correct Answer - c | |
| 86. |
Tracheids the found in all the following plants, exceptA. PteridophytesB. GymnospermsC. BryophytesD. Angiosperms |
| Answer» Correct Answer - c | |
| 87. |
In endarch condition of xylem, protoxylem lies ______of metaxylem.A. on inner sideB. on outer sideC. both on inner and outer sideD. both on inner and outer side |
| Answer» Correct Answer - A | |
| 88. |
In a longitudinal section of a root, starting from the tip upward, the four zones occur in the following orderA. Cell division, cell enlargement, cell maturation, root capB. Cell division cell matuation, cell enlargement, root capC. Root cap, cell division, cell enlargement, cell maturationD. Root cap, cell division, cell maturation, cell enlargement |
| Answer» Correct Answer - C | |
| 89. |
Jute , flax and hemp are fibres opbtained fromA. XylemB. PericarpC. Phloem parenchyma is absent in most of the monocotyuledonsD. Cortex |
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Answer» Correct Answer - C Jute flax and hemp are fibres obtained from phloem. |
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| 90. |
The commercial jute fibres are obtained fromA. Interxylary fibresB. Xylem fibersC. Phloem fibresD. None of these |
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Answer» Correct Answer - C Commercial jute fibres are obtained from phloem fibres. These are sclerenchymatous fibres but because of their presence in phloem they are called phloem fibres. They are used in making ropes. |
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| 91. |
The commercial jute fibres are obtained fromA. Primary phloemB. Secondary pholemC. Secondary xylemD. Primary xylem |
| Answer» Correct Answer - B | |
| 92. |
Fibres are obtained fromA. Xylem, phloem and sclerenchymaB. Xylem, phloem , sclerenchyma and epidermisC. xylem, parenchyma, epidermisD. Xylem, parenchyma, endodermis |
| Answer» Correct Answer - B | |
| 93. |
The chief water conducting elements of xylem in gymnosperms areA. TracheidsB. VesselsC. FibresD. Tansfusion tissue |
| Answer» Correct Answer - A | |
| 94. |
The chief water conducting elements of xylem in gymnosperms areA. VesselsB. FibersC. Transfusion tissueD. Tracheids |
| Answer» Correct Answer - D | |
| 95. |
The chief water conducting elements of xylem in gymnosperms areA. vesselsB. fibresC. transfusion tissueD. tracheids |
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Answer» Correct Answer - d The tracheids are elongated , angular dead cells with hard lignified wide lumen and narrow end walls. The walls of tracheids possess different types of thickenings and the unthickened areas of its wall allow the rapid movements of water from one tracheid to another . Tracheids are the characteristic cell types of xylem tissues in gymnosperms and pteridoohytes, where they are the chief elements of water conduction. |
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| 96. |
The chief water conducting elements of xylem in gymnosperms areA. TracheidsB. VesselsC. FibersD. Transfusion tissue |
| Answer» Correct Answer - A | |
| 97. |
Vascualr bundles surrounded by a sclerenchymatous bundle sheath is a feature ofA. Dicot rootB. Monocot rootC. Dicot rootD. Monocot stem |
| Answer» Correct Answer - D | |
| 98. |
When phloem is completely surrounded by xylem, the vascualr bundle is called fA. Concentric leptocentric / amphivasalB. concentric hadrocentric/amphicribralC. conjoint collateralD. conjoint bicollateral |
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Answer» Correct Answer - A When phloem is completely surrounded by xylem the vascular bundle is called concentric leptocentic/ amsphivasal. |
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| 99. |
Which of the following component of pholem is made up of sclerenchymatous cells?A. Pholem fibresB. Sieve tubesC. Companion cellsD. Pholem parenchyma |
| Answer» Correct Answer - a | |
| 100. |
Secondary growth usually does not occur inA. stems and roots of dicotsB. stemsandroots of gymnospermsC. stemsandroots of monocotsD. both b and c |
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Answer» Correct Answer - C Secondary growth is the increase in thickness of root or stem due to the activity of lateral meristems (vascular cambium and cork cambium). With few exceptions most of the dicots and gymnosperms show secondary growth. Roots and stems of monocot plants do not show secondary growth (due to absence of vascular cambium), with few exceptions e.e., Dracaena, Yucca, et., which exhibit anomalous secondary growth. |
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