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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.
| 351. |
Which is present in vascular bundles of gymnospermsA. Tracheids VesselsB. VesselsC. Companion cellsD. All the above |
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Answer» Correct Answer - A Trachieds are mainly found in gymnosperms while vessels are found in angiosperms. |
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| 352. |
Histogen tissues are classified on the basis ofA. Plane of dividionB. Type of cells they fromC. PositionD. Origin |
| Answer» Correct Answer - B | |
| 353. |
Maristematic tissues are composed ofA. mature cellsB. fully differentiated cellsC. cells that cannot divideD. immature cells with power to divide. |
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Answer» Correct Answer - D Meristematic region is the region of active mitotic divison in plants, from which permanent tissues are derived. It comprises of cells which are packed close to one another without any intercellular spaces meristematic cells are found in root and shoot tip region. |
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| 354. |
Root cap is absent inA. LithophytesB. HydrophytesC. XerophytesD. Mesophytes |
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Answer» Correct Answer - B Root cap is absent in adventiitous epiphytic roots of orchids, aquatic plants, parasites. |
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| 355. |
Why are xylem and phloem called complex tissues? |
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Answer» Xylem and phloem are known as complex tissues as they are made up of more than one type of cells. These cells work in a coordinated manner, as a unit, to perform the various functions of the xylem and phloem. Xylem helps in conducting water and minerals. It also provides mechanical support to plants. It is made up of the following components: Tracheids (xylem vessels and xylem tracheids) Xylem parenchyma Xylem fibres Tracheids are elongated, thick-walled dead cells with tapering ends. Vessels are long, tubular, and cylindrical structures formed from the vessel members, with each having lignified walls and large central cavities. Both tracheids and vessels lack protoplasm. Xylem fibres consist of thick walls with an almost insignificant lumen. They help in providing mechanical support to the plant. Xylem parenchyma is made up of thin-walled parenchymatous cells that help in the storage of food materials and in the radial conduction of water. Phloem helps in conducting food materials. It is composed of: Sieve tube elements . Companion cells Phloem parenchyma Phloem fibres Sieve tube elements are tube-like elongated structures associated with companion cells. The end walls of sieve tube elements are perforated to form the sieve plate. Sieve tube elements are living cells containing cytoplasm and nucleus. Companion cells are parenchymatous in nature. They help in maintaining the pressure gradient in the sieve tube elements. Phloem parenchyma helps in the storage of food and is made up of long tapering cells, with a dense cytoplasm. Phloem fibres are made up of elongated sclerenchymatous cells with thick cell walls. |
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| 356. |
The presence of intercellular spaces is the usual conspicuous feature ofA. parenchymaB. sclerenchymaC. collenchyma cellsD. Both (b) and (c ) |
| Answer» Correct Answer - A | |
| 357. |
In Old sieve tubes at the end of growing season, which of the following gets deposited over sieve plate to regulate sugar transport?A. P-proteinB. CalloseC. LigninD. Suberin |
| Answer» Correct Answer - B | |
| 358. |
A concentric amphivasal (leptocentric) vascular bundle is one in whichA. Centrally located phloem is surrounded by the xylem or xylem surrounds phloemB. Centrally located xylem is surrounded by phloemC. Xylem is flanked by phloem on the interior and exterior side onlyD. Phloem is flanked by the xylem on interior side only |
| Answer» Correct Answer - A | |
| 359. |
In monocot leafA. Bulliform cells are absent from the epidermisB. Veins form a networkC. Mesophyll is well differentiated into these partsD. Mesophyll is not differentiated into palisade and spongy parenchyma |
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Answer» Correct Answer - D In between upper and lower epidermis, there is present mesophyll tissue which is undifferentiated into palisade and spongy parenchyma, but all the cells are alike. |
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| 360. |
Vascular bundle are completely absent inA. angiospermsB. gymnospermsC. pteriodphytesD. bryophytes |
| Answer» Correct Answer - D | |
| 361. |
Common features between lenticels and hydathodes areA. allow exchange of gasesB. always remain closedC. there is no regulation of their opening and closingD. they occur on the same organ of the plugged |
| Answer» Correct Answer - C | |
| 362. |
Consider the following statement and choose the correct option(i) The thread like cytoplasmic strands, running from one cell to other is known as plasmodesmata (ii) Xylem and phloem constitute the vascular bundle of the stem (iii)The first form xylem elements are described as metaxylem (iv) Radial vascular bundles are mainly found in the leavesA. I is true, but II, III and IV are wrongB. II is true , but I, III and IV are wrongC. III is true , but I, II and IV are wrongD. I and II are true, but III and IV are wrong |
| Answer» Correct Answer - D | |
| 363. |
Consider the following statement and choose the correct option The thread like cytoplasmic strands, running from one cell to other is known as plasmodesmata (ii) Xylem and phloem constitute the vascular bundle of the stem (iii)The first form xylem elements are described as metaxylem (iv) Radial vascular bundles are mainly found in the leavesA. (i) is true , but (ii), (iii), and (iv) are wrongB. (ii) is true, but (i) ,(iii) and (iv) are wrongC. (iii) is true, but (i),(ii) and (iv) are wrongD. (i) and (ii) are true, but (iii) and (iv) are wrong |
| Answer» Correct Answer - D | |
| 364. |
Lenticels are found inA. Young dicot stemB. Old dicot stemC. Monocot rootD. Young root |
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Answer» Correct Answer - B Pore like small openings are present on bark of old stem. |
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| 365. |
Phloem is found in two patches in each vascular bundles ofA. CucurbitaB. HelianthusC. Zea maysD. Triticum |
| Answer» Correct Answer - A | |
| 366. |
Consider the following statement and choose the correct option(i) The thread like cytoplasmic strands, running from one cell to other is known as plasmodesmata (ii) Xylem and phloem constitute the vascular bundle of the stem (iii)The first form xylem elements are described as metaxylem (iv) Radial vascular bundles are mainly found in the leavesA. a,b-true,c,d-wrongB. d-true,a,b,c-wrongC. c-true,ab,d-worngD. b-true,a,c,d-wrong |
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Answer» Correct Answer - A First formed xylem elements are described as protoxylem Radial boundles are mainly found in roots |
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| 367. |
Fill in the blanks: a.In …1.. Type of vascular bundles the xyulem and phloem are situatted at the same readius of vascular bundles.Such vascular bundles are common in ..2.. b.When xylem and phloem within a vascular bundle are arranged in an alternate manner on different radii the arrangement is called ..3.. such as in ...4..A. 1-radial,2-conjoint,2-stem and leaves 4-rootsB. 1-radial,3-conjoint,4-stem and leaves, 2-rootsC. 3-radial, 1-conjoint,2-stem and leaves,4-rootsD. 3-radial, 1-conjoint,4-stem and leaves,4- roots |
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Answer» Correct Answer - C In conjoint type of vascular bundles, the xylem and phloem are sittuated at the same radius of vascular bundles. Such vascualr bundles are common in stem and leaves When xylem and phloem within a within a vascular bundle are arranged in an alternate manner on different radii the arrangemetn is called radial such as in roots. |
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| 368. |
Secondary growth or increase in diameter is due toA. Ground meristemB. ProcambiumC. Cork and phellodermD. Vascular cambium |
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Answer» Correct Answer - D Vascular cambium is made up of lateral meristem. |
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| 369. |
The large , empty and colourless cells present at intervals on the upper surface of grass leaf are calledA. Accessory cellsB. Bulliform cellsC. Palisade parenchymaD. Spongy parenchyma |
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Answer» Correct Answer - B Large, expty colourless cells present on upper surface of grass leaf are bulliform cells/motors cells |
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| 370. |
The large , empty and colourless cells present at intervals on the upper surface of grass leaf are calledA. Sccessory cellsB. Bulliform cellsC. Palisade parenchymaD. Spongy parenchyma |
| Answer» Correct Answer - B | |
| 371. |
Vascular cambium of the root is an example ofA. Apical meristemB. Intercalary meristemC. Secondary meristemD. Root apical meristem |
| Answer» Correct Answer - C | |
| 372. |
Epidermis in stem is produced fromA. PotodermB. ProcambiumC. Ground meristemD. Calyptrogen |
| Answer» Correct Answer - A | |
| 373. |
Epidermis in stem is produced fromA. ProtodermB. ProcambiumC. Ground meristemD. Calyptrogen |
| Answer» Correct Answer - A | |
| 374. |
The complex tissues includeA. ScleroidsB. SclerenchymaC. Secretory tissuesD. Collenchyma |
| Answer» Correct Answer - C | |
| 375. |
Meristematic tissues areA. premature having ability of divisionB. mature do not have ability of divisionC. premature not having ability of divisionD. complex differentiation in xylem, phloem and cambium |
| Answer» Correct Answer - A | |
| 376. |
Meristematic tissues includeA. Leaf tips, cork cambium and vascular cambiumB. Stem and root apices, cork cambium and mature fruitsC. Stem and root apices, vascular cambium and cork cambiumD. Mature fruits and leaf tips |
| Answer» Correct Answer - C | |
| 377. |
Meristematic tissues in plantsA. have their walls made of celluloseB. have intercellular spaces between themC. store reserve food materialsD. have their walls made of chitin |
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Answer» Correct Answer - A Meristematic tissues in plants have their walls made of cellulose. |
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| 378. |
What is the commerical source of cork ? How is it formed in the plant ? |
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Answer» The commerical cork is obtained from the cork tissue of Quercus suber, which yields bottle cork. Cork is formed by cork cambium or phellogen cell. Cork cambium cells divide periclinally, cutting cells towards the inside and outside The cells cut off two wards the outside become suberised and dead. These are compactly packed in radial rows without intercellular spaces and form cork of phellem. Cork is imprevious to water due to suberin and provides protection to the underlying tissues. |
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| 379. |
K. Esau dominated in the field of plant biology up to the age of 99 years. She conrtributed mainly in the field ofA. Morphology of flowering plantsB. Anatomy of seed plantsC. Classification of flowering plantsD. Physiology of seed plants |
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Answer» Correct Answer - B K Esau who dominated the field of plant biology up to age of 99 years, contributed mainly in the field of anatomey of seed plants |
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| 380. |
Casparian thickenings are found in the cells of Or In dicot roots, cells of which region show casparian stripsA. Percycle of stemB. Endodermis of stemC. Pericyhcle of rootD. Endodermis of root |
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Answer» Correct Answer - D Casparian thickening s occur in the cells of endoermis of root. |
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| 381. |
Casparian thickenings are found in the cells of Or In dicot roots, cells of which region show casparian stripsA. Pericycle of stemB. Endodermis of stemC. Pericycle of rootD. Endodermis of root |
| Answer» Correct Answer - D | |
| 382. |
Casparian thickenings are found in the cells of Or In dicot roots, cells of which region show casparian stripsA. Pericycle of the rootB. Endodermis of the rootC. Pericycle of the stemD. Endodermis of the stem |
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Answer» Correct Answer - B Endodermis is mostly single layered and is made up of parenchymatous barrel shaped compactly arranged cells. The inner and radial or transverse wall of enedodermal cells have casparian strips of sunerin. |
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| 383. |
Read the folloing statements and find out the correcty statementsA. Xylem parencyma is only living component of xylem and pholem fibre (bast fibre) is only dead component of the phloemB. The structure and function of tissues would also be dependent on the locationC. On the basis of their structure and location there are three types of tisues systems namely dermal fundamental and conducting tissue systemD. All of the above |
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Answer» Correct Answer - D Xylem parenchyma is only living component of the phloem. The structure and function of the tissues would also be dependent on the location. On the basis of their structure and location there are three types of tissues systems namelyt dermal fundamental and conductiong tissue sysem |
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| 384. |
Passage cells are present inA. EpidermisB. EndodermisC. XylemD. Lenticels and hydathodes |
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Answer» Correct Answer - B In roots thick walled endodermal cells are interrupted by thin walled cells just outside the protoxylem patches. These thn walled endodermal cells are called passage cells or transfusion cells. |
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| 385. |
Which of the following are simple tissuesA. Parenchyma,collenchyma and sclerenchymaB. Parenchyma, xylem and collenchymaC. Parenchuyma,dxylem and sclerenchymaD. xylem and phloem |
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Answer» Correct Answer - A Parenchyma , collenchgyfma and sclerenchyma are simple tissues while xylem and phloem are complex tissues |
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| 386. |
Read the following sttements carefully: (a)It is found either as a homogenous layer or in patches (b)Cells may be oval, sperical or polygonal and aoften contain chloroplasts (c)Intercellular spaces are absent (d)They provide mechanical support to the growing parts of the plant such as young stem and petiole of a leaf These character are found in :A. Parenchymatous simple tissueB. Collenchymatous simple tissueC. Sclerecymatous simple tissueD. None of the above |
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Answer» Correct Answer - B It is found either as a homogenous latyer or in patches Intercellular spaces are absent They provide mechanical support to the growing parts of the plant such as young stem and ptiole of a leaf These characateristics are found in collenchymatous simple tissue. |
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| 387. |
Read the following sttements and find out the incorrect statement.A. Jute flax and hemp are sclerechymatous fibresB. The first formed primary phloem called protophloem consistts of bigger sieve tube and later formed phloem called metaphloem has narro sieve tubesC. Phloem parenchyma is absent in most of the monocotyuledonsD. Bast fibres are made up of sclerenchymatous cells They are generally absent in the primary pholem but are found in secondary phloem |
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Answer» Correct Answer - B The first formed primary phloem called protophloem consists of narrow sieve tubes and later formed phloem called lmetatphoem has biugger siewve tubes |
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| 388. |
Common between sclerchyuma and collenchyma isA. Material transportB. Conduction of water and mineralsC. Providing buoyancyD. Providing support |
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Answer» Correct Answer - D Common between sclerenchyma and collenchyma is providing support to plant |
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| 389. |
A living mechanical tissue having cellulosic wall thickening isA. SclerenchymaB. CollenchymaC. Parenchyma and endodermisD. Aerenchyma |
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Answer» Correct Answer - B A living mechanical tissue having cellulosic wall thickening is collenchbyma |
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| 390. |
Cystoliths sometimes deposited in plant cells are crystals of (aggreagation of )A. Calcium oxalateB. Calcium carbonateC. Magnesium carbonateD. Glucosides |
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Answer» Correct Answer - B Cystolith : In the epidermal cells of Ficus bengalensis leaves, the crystals of `CaCO_(3)` accumulate in a grape manner , called as cystolith. |
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| 391. |
Wood is a common name ofA. PhloemB. Secondary xylemC. CambiumD. Vascular bundles |
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Answer» Correct Answer - B Technically, wood is secondary xylem formed by vascular cambium during secondary growth. |
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| 392. |
Intraxylary phloem may also be calledA. Internal phloemB. Included phloemC. Vestigeal phloemD. None of these |
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Answer» Correct Answer - A Internal or intraxylary phloem : It originates from procambium and is primary phloem which occurs on inner side of primary anamolous structure . E. g. , Members of Apocynaceae, Solanaceae. |
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| 393. |
Which one of the following cells types always divides by anticlinal cell division?A. Fusiform initial cellsB. Root capC. ProtodermD. Phellogen |
| Answer» Correct Answer - C | |
| 394. |
Collenchyma is mostly found in stem ofA. exrophytesB. hydrophytesC. herbaceous climbersD. woody climbers |
| Answer» Correct Answer - C | |
| 395. |
Near the upper epdermis of leaf are foundA. spongy parecnhymaB. palisade parecnhymaC. fibresD. sclereids |
| Answer» Correct Answer - B | |
| 396. |
Active division takes place in the cells ofA. XylemB. PhloemC. CambiumD. Sclerenchyma |
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Answer» Correct Answer - C Cambium represents lateral meristem of plant which has actively dividing cells . |
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| 397. |
The primary growth in Equisetum stem occurs due to the activity ofA. Apical meristemB. Intercalary meristemC. Lateral meristemD. Primordial metistm |
| Answer» Correct Answer - B | |
| 398. |
The plane of division in tunica isA. AnticlinalB. PerclinalC. Both anticlinal and periclinalD. Peripheral division |
| Answer» Correct Answer - A | |
| 399. |
Root cap is derived fromA. CalyptrogenB. PleuromeC. Periblem and histogenD. Dermatogen |
| Answer» Correct Answer - A | |
| 400. |
Root cap is derived fromA. CalyptrogenB. DermatogenC. ProtodermD. Periblem |
| Answer» Correct Answer - A | |