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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.
| 251. |
Collenchyma occurs in the stem and petioles ofA. xerophytesB. monocotsC. dicot herbsD. hydrophytes |
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Answer» Correct Answer - c Collenchyma is a simple permanent tissue , made of elongated living cells having thickened pectocellulosic walls. It is a living mechanical tissue which provides both mechanical strength and elasticity and allow them to grow in size. Collenchyma is found in epidermis of dicot stem and petioles and abundant in climbing stems. |
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| 252. |
Monocot leaves possesA. intercalary meristemB. lateral merstemC. apical meristemD. mass meristem |
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Answer» Correct Answer - a intercalary meristems are derived from the apical meristems and separated from the same by permanent cells . These meristems occur at leaf bases and above or below the nodes (e.g. grass, mint).They help in elongation of leaves and internodes besides allowing the prostrate stems to become erect. |
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| 253. |
Vascular cambium and cork cambium areA. parts of secondary xylem and phloemB. parts of pericycleC. lateral meristemsD. apical merstems |
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Answer» Correct Answer - c Lateral meristems are present along the lateral sides of stem and root . They divide only in radial direction. The cambium of vascular bundles (fascicular , intrafascicular) and the cork cambium or phellogen belongs to this category and are found in dicotyledons and gymnosperms. |
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| 254. |
P- protein is found inA. sieve tubesB. tracheisC. vesselesD. collenchyma |
| Answer» Correct Answer - A | |
| 255. |
Vascular cambium and cork cambium are the examples ofA. apical meristemB. lateral meristemC. intercalary meristemD. promeristem |
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Answer» Correct Answer - B Fascicular vascular cambium, interfascicular cambium and cork cambium are examples of lateral meristems. |
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| 256. |
P- protein is found inA. CollenchymaB. ParenchymaC. XylemD. Sieve tube |
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Answer» Correct Answer - D A sieve tube is analogous to RBC , both being living but enucleated at maturity. A network of fibres of `P_(1) and P_(2)` protein is present in the central part of lumen of sieve tube which controls movement of materials and with callose, the sealing of pores after injury. |
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| 257. |
The cells of the quiescent centre are characterised byA. having dense cytoplasm and prominent nucleiB. having light cytoplasm and small nucleiC. dividinig regularly to add to the corpusD. dividing regularly to add to tunica. |
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Answer» Correct Answer - B A quiescent centr is found in the centre of the root apex.Cell divisions are very few in the quiescent centre as there is very little synthesis of new proteins. Cells of quiescent centrehave small nuclei and light cytoplasm. |
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| 258. |
Assertion: pertroplants produce large amount of latex Reason: The latex contains long chain hydrocarbonsA. 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 - A | |
| 259. |
How many shoot apical meristems are likely to be present in a twig of a plant possessing, 4 branches and 26 leavesA. 26B. 1C. 5D. 30 |
| Answer» Correct Answer - c | |
| 260. |
Study the following statements regarding the anatomy of isobilateral leaf. (i) Stomata are equally distributed on both the surfaces certain adaxial epidermal cells are modified into bulliform cells in grasses. (iii). The vasuclar bundles are radial (iv). Phloem is adaxially placed. Which of the above statements are correct?A. (i) and (ii)B. (ii) and (iii)C. (ii) and (iv)D. all are correct |
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Answer» Correct Answer - A In an isobilateral (equifacial) leaf, vascular bundles are conjoint and collateral. Xylem lies towards the adaxial (upper) side and phloem lies towards abaxial (lower) side of leaf. |
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| 261. |
The stomata in an isobilateral leafA. Are present only on the adaxial epidermisB. Are present only on the abaxial epidermisC. Are absent on both the surfaces of the epidermisD. Are present on both the surfaces of the epidermis |
| Answer» Correct Answer - D | |
| 262. |
older resin-clogged central seconedary xylem and younger outer secondary xylem are respectively known asA. Alburnum amd duramenB. Duramen and alburnumC. Heart wood and sap woodD. Both B andC |
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Answer» Correct Answer - D Older central secondary xylem and younger outer secondary xylem are respecitively known as duramen/heart wood and alburnum / sap wood. |
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| 263. |
Pith is well developed inA. Dicot stem and monocot rootB. Monocot stem and dicot rootC. Monocot root and monocot stemD. Dicot root and dicot stem |
| Answer» Correct Answer - a | |
| 264. |
Porous wood contains mainlyA. VesselsB. tracheidsC. FibresD. parenchyma |
| Answer» Correct Answer - A | |
| 265. |
dendrochronology is the study ofA. Hieght of a treeB. Diameter of a treeC. Age of the tree by counting the number of annual rings in the main stemD. None of these |
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Answer» Correct Answer - C Dendrochronology is the study of age of the tree by counting the number of annual ring s in the main stem. |
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| 266. |
In old trees, central dark coloured, non-conducting part of secondary xylem is referred to asA. heartwoodB. sapwoodC. softwoodD. hardwood |
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Answer» Correct Answer - A Heartwood (duramen) is the central wood of an old stem. It is dark coloured part of secondary xylem. Living cells are absent here. The tracheary elements are plugged by tyloses and have deposition of tannins, resins, gum, etc. heartwood is heavier. It is more durable due to its little susceptibility to the attack of pathogens and insects. the outer or peripheral portion of the trunk is soft and lighter in colour. it performs the function of conduction of water and minerals and is known as sapwook or alburnum. |
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| 267. |
Xylotomy is study of wood. Dendrochronology is the study ofA. diameter of treeB. secondary growth of a treeC. age of tee by counting annual rings in main truckD. counting of the number of branches |
| Answer» Correct Answer - C | |
| 268. |
In olds trees, part of secondary xylem that conduct `H_(2) O` and minerals is caleldA. heart wookB. sap woodC. late woodD. early wood |
| Answer» Correct Answer - B | |
| 269. |
Tous is concerned withA. boardered pitsB. thalamusC. both (1) and (2)D. vessels |
| Answer» Correct Answer - C | |
| 270. |
Assertion: Monocotyledonous and dicotyledonous plants shownmarked variation in their internal structures.They differ in type , number and location of vascular bundles Reason: The secondary growth occurs in most of the dicotyledonous roots and stems and it increases the girth (diameter ) of the organs by the activity of the vascular cambium and the cork cambium |
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Answer» Correct Answer - B Monocotyledonous and dicotyledonous plants show marked vaiation in theiur interal structured. They differ in type, number and location of vascxular bundles. The secondary growth occurs in most of the dicotyledonous roots and stems and it increases the giorth (diameter) of the organs by the acitvity of the vascualar cambium nd the cork cambium. |
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| 271. |
Arrange the following in the order of their location from periphery to centre in the entire dicotyledonous plant body (i) Fusiform cells (ii) Trichoblasts (iii) colloytes tyloses (iii) collocytes (iv) Tyloses The correct sequence isA. b, c, a, dB. a, b, c, dC. d, a, b, cD. c, b, a, d |
| Answer» Correct Answer - A | |
| 272. |
Match th comlumn and chooe the correct combination A. `a to iv, bto v, cto ii, d toi, eto iii`B. `a to v, bto iii, cto i, d toii,e toiv`C. `a to ii, bto v, cto iii, d toiv,e toi`D. `a to iv, bto v, cto i, d toii,e toiii` |
| Answer» Correct Answer - D | |
| 273. |
In (i) porous wood, vesel are very broad in the (ii) wood and are quite narrow in the (iii) wood. This king of wood is present in (iv) and it translocates (v) amount of water when required by the plant. Select the correct fill ups for the above paragraph.A. (i)-diffuse,(ii)-autumn, (iii)-spring,(iv)- Dalberigia sissoo,(v)-moreB. (i)-diffuse, (ii)-sprinig, (iii)-autumn, (iv)-Syzygium cumini, (v)-lessC. (i)-ring, (ii)-spring,(iii)-autumn, (iv)- Dalbergia sissoo, (v)-moreD. (i)-ring, (ii)- autumn, (iii)- spring, (iv) Syzygium cumini, (v)-less |
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Answer» Correct Answer - C Porous wood is the dicotyledonous wood that contains abundant vessels. Porous wood can be ring porous or diffuse porous. In ring porous wood, vessels are very broad in the spring wood and are quite narrow in the autumn wood. This kiond of wood is present in Dalbergia sissoo, Cassia fistula, etc. Ring porous wood is more advanced as it provides better translocation when the requirement of the plant is high. |
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| 274. |
Study the flow chart given below: Which of the following statements is incorrect regarding this?A. P can be root apical meristemwhich is generally sub-terminal in position.B. Q can bephloem which is also called bast.C. R can be parenchyma which comprises of thin walled isodiametric cells.D. S can becollenchyma which is a living mechanical |
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Answer» Correct Answer - D P could be meristermatic tissues which possess the abilityto grow and divide. Q could be phloem which contains only one type of dead cells i.e., pholem fibres, other types of cells of phloem are living. R could be parenchyma which is chiefly a storage tissue. S colud be sclerenchyma which is a dead mechanical tissue and possesses uniform lignified wall thickenings. collenchyma possesses localised wall thickenings of clellulose or pectocellulose. |
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| 275. |
Function of storage is performed byA. ParenchymaB. SclerenchymaC. PhloemD. All the above |
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Answer» Correct Answer - A Parenchyma storage of food materials. E. g., Carrot , Beet root etc. |
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| 276. |
In sieve elements, the possible function of p-proteins isA. autolytic enzymesB. prevent leakage of phloem exudateC. providing energy for active translocationD. deposition of callose on sieve plates |
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Answer» Correct Answer - B When the sieve elements get disrupted, the P-proteins quickly aggregate at the sieve plate to from a clot which prevents the leakage of phloem exudates through wound. |
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| 277. |
Plants showing anomalous secondary growth includeA. AgaveB. DracaenaC. YuccaD. all of these |
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Answer» Correct Answer - D Anomalous secondary growth is abnormal type of secondary growth that occurs in some arborescent mononcots (e.e., Dracaens, Yucca, Agave) and storage roots (e.g., beet, sweet potato etc.). |
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| 278. |
Stele consits ofA. PhloemB. XylemC. PericylcleD. All of the above |
| Answer» Correct Answer - D | |
| 279. |
The stems of hydrophytic plants are soft and weak because of the poor development ofA. Pith and supporting parencymaB. Phloem and comanion cellsC. Xylem and suppoting tissueD. Cortex and endodermis |
| Answer» Correct Answer - C | |
| 280. |
The lightest wood isA. Cereus gigantusB. Ochroma lagopusC. Hardwickia binataD. Cycas |
| Answer» Correct Answer - B | |
| 281. |
Which of the following components of xylem is livingA. Xylem tracheidsB. Xylem vesselsC. PrenchymaD. None of these |
| Answer» Correct Answer - C | |
| 282. |
Which is least differentiated ?A. Simple tissuesB. ParenchymaC. Circulatory tissueD. Complex tissues |
| Answer» Correct Answer - B | |
| 283. |
The term parenchyma was coined byA. HookeB. SchleidenC. GrewD. Mettenius |
| Answer» Correct Answer - C | |
| 284. |
Companion cells are found inA. EpidermisB. CambiumC. XylemD. Phloem |
| Answer» Correct Answer - D | |
| 285. |
Ground tissue includesA. All tissues internal to endodermisB. All tissues external to endodermisC. All tissues except epidermis and vascular bundlesD. Epidermis and cortex |
| Answer» Correct Answer - C | |
| 286. |
A common structural feature of vessel elements and sieve tube elements isA. Enucleate conditionB. Presence of p-proteinC. Thick cecondary wallD. Pores on lateral walls |
| Answer» Correct Answer - A | |
| 287. |
Ground tissue includesA. all tissues except epidermis and vascular bundlesB. epidermis and cortexC. all tissues internal to endodermisD. all tissues external to endodermis |
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Answer» Correct Answer - A All tissues except epidermis and vascular bundles constitute the ground tissue of fundamental tissue. It consists of simple tissues, such as parenchyma, collenchyma and sclerenchyma. Ground tissue includes cortex, pericycle, medullary rays. In leaves, the ground tissue consists of mesophyll. |
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| 288. |
Which of the following in not found in pinus?A. Bordered pitsB. Resin canalsC. Xylem tracheids and needlesD. Manoxylic wood |
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Answer» Correct Answer - D Pinus wood is monoxyleic and pyconoxylic . |
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| 289. |
Radial conduction of water takes place byA. vesselsB. vessels and tracheidsC. phloemD. ray parenchymatous cells |
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Answer» Correct Answer - D Ray parenchyma cells are responsible for lateral movement of water and food materials. |
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| 290. |
Is Pinus an evergreen tree ? Comment. |
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Answer» Evergreen plant are those which has leaves persistent in all the four seasons. In contrast to deciduous plants which completely loose their foliage during winder or dry season. Pinus belonging to gymnosperms is an evergeen tree. The flowering plants under conditions of extreme cold shed their leaves and become dormant But Pinus due to the presence of bark, which is thick, needle-like leaves having sunken stomata, reduce the rate of transpiration. The cold areas are both physiologically and physically dry due to scanty rainfall, presence of bark, which is thick, needle-like leaves having sucken stomata, reduce the rate of traspiration. The cold areas are both physiologically and physically dry due to scanty rainfall, precipitation as snow, decreased root absorption at low temperature and exposed habitats But, Pinus is well adapted to such conditions. It continues to manufacture food during this period and grown to dominate other plants. This show that pinus is an evergreen tree. It do not shed its leaves, i.e., needles under any condition. |
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| 291. |
Interfascicular cambium develops from the cells ofA. xylem parenchymaB. endodermisC. pericycleD. medullary rays |
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Answer» Correct Answer - D In dicot stems, the cells of cambium present between primary xylem and primary phloem is the interfascicular cambium. The cells of medullary rays, adjoining these interfascicualr cambium become meristematic and form the interfascicular cambium. |
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| 292. |
Mesophyll is differentiated in to plaisade and spongy tissues inA. Extremely xerophytic leavesB. Hydrophytic leavesC. Monocot leavesD. Dicot leaves |
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Answer» Correct Answer - D Mesophyll is diffeentiated in to plaisade and spongy tissues in dicot leaves |
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| 293. |
Water containing cavities in vascular bundles are found inA. SunflowerB. MaizeC. CycasD. Pinus |
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Answer» Correct Answer - B Stem of maize has water containing cavities in vascular bundles. |
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| 294. |
An annual ring is formed byA. Two consecutive rings of spring woodB. Two alternate rings of spring wood and autumn wood.C. Two consecutive rings of autumn woodD. Two alternate rings of sapwood and heartwood |
| Answer» Correct Answer - B | |
| 295. |
When the bulliform cewlls in the leavbes have absorbed water and are …1…. The leaf..2… .when they are ..3… due to water stress, they makes the leaves ..4.. To minimise water loss Fill in the correct choiceA. 1-flaccid ,2-curl inward,3-turgid,4-surface is exposedB. 1-turgid, 2-surface is exposed,3-flaccid,4-cural inwardC. 1-flaccid,2-surface is exposed,3-trugid,4-curl inwardD. 1-turgid,2-curl inward, 3-flaccid,4-surface is exposed |
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Answer» Correct Answer - B When the bulliform cells in the leaves have absorbed water and are turgid, the leaf surface is expaosed when they are flaccide due to water stress, they makes the leaves curl in ward to minimixe water loss. |
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| 296. |
The wood is, in fact, aA. Primary xylemB. Primary phloemC. Secondary xylemD. Secondary pholem |
| Answer» Correct Answer - C | |
| 297. |
Assertion : Bulliform cells are useful in the unrolling of leaf . Reason : Bulliform leaves store water.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 - B In isobilateral leaves, the upper epidermis contains sepcialized cells, i.e., bulliform or motor cells. They are highly vacuolate and can store water, if available. However, in case of water deficiency the bulliform cells lose water and become flaccid. As a result the leaf gets rolled upto reduce the exposed surface. the bulliform cells are also useful in the unrolling of leaf during its development. |
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| 298. |
The vascular bundles in a dicot root areA. Radial and endarchB. Conjoint and exarch Concentric and exarchC. Concentric and exarchD. Radial and exarch |
| Answer» Correct Answer - D | |
| 299. |
In a dicot stem, the interfasicular cambium strip arisesA. Between xylem and pholemB. From medullary raysC. From pithD. From pericycle |
| Answer» Correct Answer - B | |
| 300. |
Cambium ring in dicot system isA. Primary meristerm in originB. Secondary meristem in originC. Promeristem in originD. Both primary and secondary meristem in origin |
| Answer» Correct Answer - D | |