Root cap in monocots is formed by · ANATOMY OF FLOWERING PLANTS Revise Most Important Questions to...

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Q-1-13843457

Root cap in monocots is formed by

(A)dermatogen

(B)calyptrogen

(C)vascularcambium

(D)woundcambium

CORRECTANSWER:B

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Q-2-16023477

Druse is a crystal or deposit of

(A)Calcuimoxalate

(B)Calciumcarbonate

(C)Starch

(D)Silica

CORRECTANSWER:A

SOLUTION:

Calciumoxalatesubstancesdepositedonthecuticle

surface.DruseandRaphides(e.g.,Pistia)arecrystals.

Q-3-13843547

In old trees, central dark coloured, non-conducting part of

secondary xylem is referred to as

(A)heartwood

(B)sapwood

(C)softwood

(D)hardwood

CORRECTANSWER:A

SOLUTION:

Heartwood(duramen)isthecentralwoodofanoldstem.

Itisdarkcolouredpartofsecondaryxylem.Livingcells

areabsenthere.Thetrachearyelementsarepluggedby

tylosesandhavedepositionoftannins,resins,gum,etc.

heartwoodisheavier.Itismoredurableduetoitslittle

susceptibilitytotheattackofpathogensandinsects.the

outerorperipheralportionofthetrunkissoftandlighter

incolour.itperformsthefunctionofconductionofwater

andmineralsandisknownassapwookoralburnum.

Q-4-16023225

Tunica corpus theory was proposed by

(A)Schmidt

(B)Strasburger

(C)Nageli

(D)Hofmeister

CORRECTANSWER:A

SOLUTION:

ThistheorywasproposedbySchmidt(1924).This

theoryrecognizesonlytwozonesintheapical

meristems.

Q-5-13843473

Match column I with column II and select the correct option from

the given codes.

(A)A-(iv),B-(iii),C-(ii),D-(i)

ColumnI ColumnIIA. Vessels (i)

.CEllsareliving,withthincellulosiccellswalls

B. Tracheids (ii).

Cellspossesshighlythickenedwallswithobliteratedcentrallumen

C. Xylemfibres (iii.

Individualmembersareinterconnectedthroughperforationsintheir

D. Xylemparenchyma (iv.

Elongatedtube-likecellswiththick,lignifiedwallsandtaperingends

(B)A-(iii),B-(iv),C-(ii),D-(i)

(C)A-(ii),B-(iv),C-(iii),D-(i)

(D)A-(iv),B-(ii),C-(iii),D-(i)

CORRECTANSWER:B

Q-6-16023238

From evolutionary point of view, tracheids and sieve cells are more

primitive than tracheae and sieve tubes respectively. The

angiosperms have

(A)Tracheaeandsievetubes

(B)Tracheids,tracheaeandsievetubes

(C)Tracheids,sievecellsandsievetubes

(D)Tracheids,tracheaeandsievecells

CORRECTANSWER:B

Q-7-16023396

Healing of wound in plants takes place by the activity of

(A)Groundtissue

(B)Callusdeposition

(C)Secondarymeristem

(D)Permanenttissue

CORRECTANSWER:B

SOLUTION:

Whenwoundisdeepitishealedasfollowshealthycells

adjacenttothewoundformamassofparenchymatous

cellscalledcallus.Thiscalluscoversthewoundentirely.

Thuswoundinhealed.

Q-8-16023330

Epiblema in roots is derived from

(A)Protoderm

(B)Procambium

(C)Groundmeristem

(D)Calyptrogen

CORRECTANSWER:A

Q-9-13843469

Idioblasts are

(A)sclerenchymatousfibresfoundintheleafofYucca

(B)specialisedparenchymatouscellswhichcontains

ergasticsubstances

(C)Collenchymatouscellspossessingangular

thickenings

(D)crystalsofcalciumoxalatefoundinhardfruits

CORRECTANSWER:B

SOLUTION:

Idoblastsarespecialisednon-greenlarge-sized

parenchymacellswhichpossessinclusionsor

ingredientsliketannins,oils,crystals,etc.

Q-10-16023249

Interfascicular cambium develops from the cells of

(A)Pericycle

(B)Medullaryrays

(C)Xylemparenchyma

(D)Endodermis

CORRECTANSWER:B

Q-11-24556665

When wepeel the skin of a potato tuber, we remove

(A)periderm

(B)epidermis

(C)cuticle

(D)sapwood

CORRECTANSWER:A

SOLUTION:

PeridermPatatoisaundergroundstem.Theouter

epidermallayerofthestemisknownasperiderm.So

whenweremoveskinofpotato.Weareactually

removingtheperiderm.

Q-12-16023351

Root cap is absent in

(A)Lithophytes

(B)Hydrophytes

(C)Xerophytes

(D)Mesophytes

CORRECTANSWER:B

SOLUTION:

Rootcapisabsentinadventiitousepiphyticrootsof

orchids,aquaticplants,parasites.

Q-13-13843459

The cells of the quiescent centre are characterised by

(A)havingdensecytoplasmandprominentnuclei

(B)havinglightcytoplasmandsmallnuclei

(C)dividinigregularlytoaddtothecorpus

(D)dividingregularlytoaddtotunica.

CORRECTANSWER:B

SOLUTION:

Aquiescentcentrisfoundinthecentreoftheroot

apex.Celldivisionsareveryfewinthequiescentcentre

asthereisverylittlesynthesisofnewproteins.Cellsof

quiescentcentrehavesmallnucleiandlightcytoplasm.

Q-14-16023242

At maturity the sieve plates become impregnated with

(A)Cellulose

(B)Pectin

(C)Suberin

(D)Callose

CORRECTANSWER:D

Q-15-16023557

Conjoint, collateral and closed vascular bundle is found in

(A)Monocotstem

(B)Monocotroot

(C)Dicotstem

(D)Dicotroot

CORRECTANSWER:A

Q-16-16023265

The histogen layer present at the apex of the root tip is called

(A)Dermatogenprocambium

(B)Procambium

(C)Calyptrogen

(D)Plerome

CORRECTANSWER:A

Q-17-16023526

Kranz anatomy is found in

(A)Monocots

(B)Dicots

(C)Both(a)and(b)

(D)Noneofthese

CORRECTANSWER:C

SOLUTION:

Kranztypeanatomyaccursinbothmonocolleaves

(e.g.,Sugarcane,MaizeandSorghumetc.)andsome

dicotleaves(e.g.,Amaranthus-edulis,Atriplexrosea

Q-18-13843482

Select the incorrect pair out of the following

CORRECTANSWER:D

SOLUTION:

Phloemisacomplexpermanenttissuethattransports

organicfoodinsidetheplants.Xylemisacomplex

permantnttissuethatperformsthefunstionofascentof

sapi.e.,transportofinorganicnutrients(waterand

minerals)withintheplant.

Typeoftissue FunctionParenchyma Storeage,photosynthesis

Typeoftissue FunctionSclerenchyma Mechanicalstrength

Typeoftissue FunctionXylem Ascentofsap

Typeoftissue FunctionPhloem Conductionofwaterandminerals

Q-19-16023363

P- protein is found in

(A)Collenchyma

(B)Parenchyma

(C)Xylem

(D)Sievetube

CORRECTANSWER:D

SOLUTION:

AsievetubeisanalogoustoRBC,bothbeinglivingbut

enucleatedatmaturity.Anetworkoffibresof

proteinispresentinthecentralpartofP1 and P2

lumenofsievetubewhichcontrolsmovementof

materialsandwithcallose,thesealingofporesafter

injury.

Q-20-16023259

The baloon like outgrowth of parenchyma in the lumen of a vessel

is known as

(A)Histogen

(B)Tyloses

(C)Phellogen

(D)Tunica

CORRECTANSWER:B

SOLUTION:

Tylosesareballoonlikestructuresdevelopfromxylem

parenchyma.

Q-21-16023591

Annual rings are distinct in plants growing in

(A)Tropicalregions

(B)Arcticregion

(C)Grasslands

(D)Temperateregion

CORRECTANSWER:D

SOLUTION:

Annualringsareformedduetovariationinclimatic

conditionsofanyregion.Springseasonandautumn

seasonoccurintemperateregion,thusclearannual

ringsareformed.

Q-22-13843521

Select the mismatched pair

(A)collateralandopenvascularbundles-sunflowerstem

(B)Bicollateralvascularbundles-Maizestem

(C)Concentricvascularbundles-ferns

(D)Radialvascualrbundles-maizeroot

CORRECTANSWER:B

SOLUTION:

Bicollateralvascularbundleshavephloembothonthe

outerandinnersideofxylem.Allthethreelieonthe

sameradiauusuallyastripofvascularcambiumis

presentonbothouterandinnersidesofxylem.

Bicollateralvascularbundlesoccurincucurbitaceae

(e.g.,pumpkinorcucurbitapepo,RidgegourdorLuffa

cyliderica)andsomemembersoffamiliessolanaceae,

Convolvulaceae,etc.

Q-23-16023313

Bordered pits ae found in

(A)Phloem

(B)Protoxylem

(C)Mataxylem

(D)Pith

CORRECTANSWER:C

SOLUTION:

Metaxylemconsistoftwolargerandroundedvessels

situatedonthesideswiththepittedtracheidsinbetween

Q-24-26855926

vascular bundles are closed when they

(A)Groundtissue

(B)conjuctivetissue

(C)Cambium

(D)Pith

CORRECTANSWER:C

SOLUTION:

Closedvascularbundleslackcambium.

Q-25-26855928

The plant tissues commonly found in fruit walls of nuts and pulp of

some fruits like guava are termed as

pear fruits are gritty due to the presence of

Tissue composed of nin-parenchymatous cells and have

isodiametric or irrengular shape is called

(A)Tracheidsareunicellularwithwidelumen

(B)Fibres

(C)Vessels

(D)Sclerids

CORRECTANSWER:D

SOLUTION:

Pearfruitsaregrityduetooccureenceofscelereids.

Q-26-13843535

Which of the following is an incorrect pair?

(A)Hypostomatic-stomatapresentmoreonlower

epidermisthanonupper

(B)Epistomatic-stomatapresentmoreonupper

epidermisthanonlowerepidermis

(C)Amphistomatic-Stomatanon-functionalorabsent

(D)Sunkenstomata-Stomatasteatedbelow

CORRECTANSWER:C

SOLUTION:

Inamphistomaticxondition,boththesurfaceofleaf

containsstomata.

Q-27-16023311

The histogens are classified on the basis

(A)Cellstheycontain

(B)Cellstheygiverisetofuturetissue

(C)Meristematicactivity

(D)Celldivision

CORRECTANSWER:B

Q-28-13843554

Which of the following options carrectly shows the sequence of

difference tissues fo the periderm starting from periphry?

(A)Phellogen Phellem Phelloderm

(B)Phellem phelloderm pheogen

(C)Phellem phellogen phelloderm

(D)Phelloderm phellogen phellem

→ →

CORRECTANSWER:C

SOLUTION:

Inordertoprovideincreaseingirthandprevent

repturingoftheoutergroundtissuesduetothe

formationofsecndaryvasculartissues,icotstems

produceacorkcambiumorphellogenintheouter

corticalcells.Thecellsofthisphellogendivide

periclinallytoproducephellemorcorkontheouterside

andsecondarycortexorphellodermontheinnterside.

phellem,phellogenandphellodermcollectively

constituteperiderm.

Q-29-16023284

The casparian strips of root endoderm contain a mixture of

(A)Celluloseandcutin

(B)Celluloseandlignin

(C)Ligninandsuberin

(D)Celluloseandsuberin

CORRECTANSWER:C

SOLUTION:

Inendodermis(strachsheath)theinnerandradialor

transversewallofendodermalcellshavecasparian

stripsofsuberin.

Q-30-13843499

Select the mismatched pair out of the following

(A)Radialvascularbundle-Xylemandphloemon

differentradii

(B)Bicollateralvascularbundle-Phloempresentonboth

didesofxylem

(C)Amphivasalvascularbundle-Phloemsurrounds

(D)Conjointvascularbundle-Xylemandphloemon

sameradii

CORRECTANSWER:C

SOLUTION:

Inamphivasalorlaptocentricvascularbundles,xylem

surroundsphloeme.g.,Dracaena,Yucca

Q-31-16023264

Laticiferous vessels instead of laticiferous cells are found in

(A)Ficus

(B)Calotropis

(C)Paoppy

(D)Nerium

CORRECTANSWER:C

SOLUTION:

LatexvesselsfoundinPoppy(Papaver).

Q-32-16023608

Fusiform initials form

(A)Vascularrays

(B)Trachearyelements

(C)Rayparenchyma

(D)Phloemparenchyma

CORRECTANSWER:B

SOLUTION:

Treachearyelementssuchastracheids,vessels,fibers,

sievetubesformedbyfusiforminitials.

Q-33-36805926

Pollen grains can be stored for several years in liquid nitrogen

having a temperature of

CORRECTANSWER:A

SOLUTION:

Pollengrainscanbestoredforseveralyearsinliquid

nitrogenhavingatemperatureof

Pollengrainscanbelaterusedinplantbreeding

programmes.

Q-34-16023373

−196 ∘C

−80 ∘C

−120∘C

−160∘C

−196C

Rod shaped elongated sclereids found in the seed coats of pulses are

known as

(A)Astrosclereids

(B)Macrosclereids

(C)Trichosclereids

(D)Branchysclereids

CORRECTANSWER:B

SOLUTION:

Macrosclereidsorrodcellsarerodshapedelongated

sclereidsusuallyfoundintheleaves,cortexofstemand

outerseedcoats.

Q-35-16023682

A vesselless piceof stem possessing prominent sieve tubes would

belong to

(A)Pinus

(B)Eucalyptus

(C)Grass

(D)Trochodendron

CORRECTANSWER:D

Q-36-13843516

Hypodermis is _____in sunflower stem and ______in maize stem

(A)parenchymatous,collenchymatous

(B)collenchymatous,sclerenchymatous

(C)sclerenchymatous,collenchymatous

(D)sclerenchymatous,parenchymatous

CORRECTANSWER:B

SOLUTION:

Insunflower,hypodermisismadeupofcollenchyma,

whichmaybegreen.Inmaize,hypodermisisformedof

non-greensclerenchymatissue.

Q-37-16023333

Tunica differs from corpus in

(A)Position

(B)Rateofgrowth

(C)Planeofdivision

(D)Regionofactivity

CORRECTANSWER:C

SOLUTION:

Planeofdivisionintunicaisanticlinalandincorpusitis

periclinal.

Q-38-13843552

The terms 'wood' and 'bast' respectively refer to

(A)xylemandcork

(B)phloemandxylem

(C)xylemandphloem

(D)phloemandcork

CORRECTANSWER:C

SOLUTION:

Xylemisalsoknownaswood.Itconsistsoffourtypesof

cells,viz.tracheidsvessels(bothtrachearyelements),

xylemorwoodparencymaandxylemorwoodfibres.

Phloemisalsocalledbast.Itconsistsoffourtypesof

cells,viz,sievetubes,companioncells,phloem

parenchymaandfibres.

Q-39-16023228

Tracheids differ from other tracheary elements in

(A)Lackingnucleus

(B)Beinglignified

(C)Havingcasparianstrips

(D)Beingimperforate

CORRECTANSWER:D

SOLUTION:

Vesselisalongcylindricaltubelikestructuremadeof

manycells,calledvesselmembers,eachwithlignified

wallsandalargecentralcavity.Vesselmembersare

interconnectedthroughperforationintheircommonwalls

Q-40-16023239

In pteridophyta and gymnosperms which cells are present in place

of companion cell

(A)Sclereids

(B)Albuminouscells

(C)Idioblasts

(D)Noneofthese

CORRECTANSWER:B

SOLUTION:

Albuminouscells:Thesecellsarestoragecellswhich

arefoundinpteridophytesandgymnospermsstem,they

storemineralsaswellasstarch.

Q-41-13843470

Bone shaped sclerenchymatous cells found in hypodermal layers of

some seeds and fruits are called

(A)osteosclereids

(B)macrosclereids

(C)brachysclereids

(D)trichosclereids

CORRECTANSWER:A

SOLUTION:

Osteosclereidsareatypeofsclereidswhicharebone-

shapedorcolumnarwithswollenends,presentin

subepidermalcoveringofsomelegumeseeds.

Q-42-16023545

Pith is a central part of the ground tissue generally made up of

(A)Parenchyma

(B)Collenchyma

(C)Chlorenchyma

(D)Sclerenchyma

CORRECTANSWER:A

SOLUTION:

Pithisgenerallyhavingthinwalledparenchymatous

cells,whichhelpinstorage.

Q-43-16023270

Cystoliths sometimes deposited in plant cells are crystals of

(aggreagation of )

(A)Calciumoxalate

(B)Calciumcarbonate

(C)Magnesiumcarbonate

(D)Glucosides

CORRECTANSWER:B

SOLUTION:

Cystolith:IntheepidermalcellsofFicusbengalensis

leaves,thecrystalsof accumulateinagrape

manner,calledascystolith.

Q-44-16023613

Knots in stems are formed due to

(A)Tumorsformedduetobacterialinfectionofwounds

(B)Outgrowthofsecondaytissueoverwounds

(C)Injurycausedbyinsects

(D)Noneoftheabove

CORRECTANSWER:B

SOLUTION:

Knots:Whenwoundsaroundcellsundergorapidcell

division,thenwoundiscoveredbycellsbutthewoundis

notcompletelyhealup,soinadultstemknotsare

established.

Q-45-13843477

In (i), protoxylem lies towards periphery and metaxylem lies

towards centre. Such an arrangement of primary xylem is called as

CORRECTANSWER:D

SOLUTION:

Inexarchconditionofxylem,protxylemorthefirst

formedxylemispresenttowardstheperipherywhile

metaxylemorlaterformedxylemispresenttowardsthe

centreoftherootsuchanarrangementcanbeseenin

ColumnI ColumnIIstems endarch

ColumnI ColumnIIstems exarch

ColumnI ColumnIIroots endarch

ColumnI ColumnIIroots exarch

roots.

Q-46-16023318

Sieve tubes have

(A)Apicalandobliquesepta

(B)Perforatedandlongitudinalsepta

(C)Perforatedandobliquesepta

(D)Simpleobliquewall

CORRECTANSWER:C

Q-47-16023474

Multiple epidermis on dorsal and ventral side of the leaf is

(A)Zeamays

(B)Ficusbenghalensis

(C)Mangiferaindica

(D)Neriumoleander

CORRECTANSWER:D

SOLUTION:

BecauseNeriumoleanderisxerophyticplantand

multipleepidermisisformedtocheckthelossofwater

fromleaves.

Q-48-26855894

in an annual ring , the light coloured part is

(A)Heartwood

(B)Sapwoodandgivesmechanicalsupporttothestem

(C)Earlywood

(D)Latewood

CORRECTANSWER:C

SOLUTION:

Inanannualrign,thelightcolouredpartisearlywood.

Q-49-16023308

Collenchymatous tissue is found in

(A)Climbingplants

(B)Aquaticplants

(C)Woodyclimbers

(D)Herbaceousclimbers

CORRECTANSWER:A

SOLUTION:

Becausesuchplantsneedmuchflexibility.

Q-50-16023696

Grafting is not possible in monocots because they

(A)Havescatteredvascularbundles

(B)Haveparallelvenation

(C)Areherbaceous

(D)Lackcambium

CORRECTANSWER:D

SOLUTION:

Anewverietyisproducedbyjoiningpartsoftwo

differentplants(withthehelpofcambia)iscalled

grafting.Inmonocotscambiumisabsenthencetheparts

oftwodifferentplantsareunabletojointeachother.

Q-51-13843524

Lysigenous cavity in monocot stem vascular bundles develops by

the dissolution of

(A)protoxylem

(B)maetaxylem

(C)phloem

(D)groundtissue

CORRECTANSWER:A

SOLUTION:

Thereisawatercontaininglysigenouscavityinmonocot

stem,attheendofprotoxylemvessels.Itisformedby

thedissolutionofinnerprotoxylemvesseland

parenchyma.

Q-52-16023300

The calytrogen of the root apex forms

(A)Rhizoids

(B)Rootnodule

(C)Roothairs

(D)Rootcap

CORRECTANSWER:D

Q-53-16023226

History theory was proposed by

(A)Bailey

(B)Haberlandt

(C)Hanstein

(D)Schmidt

CORRECTANSWER:C

SOLUTION:

ThisconceptwasgivenbyHanstein(1870).According

tothis,thereare3groupsofinitialsintheshootapex.

Q-54-16023406

Quiescent centre is found in

(A)Stemtip

(B)Roottip

(C)Leaftip

(D)Noneofthese

CORRECTANSWER:B

SOLUTION:

Attheapexofrootssomecellsarenotdividing,this

regioniscalledquiescentcentre.

Q-55-13844355

66,55,44

Q-56-16023368

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=pottedwithborder,F=pittedsimple

(B)A=annular,B=spiral,C=scalariform,C=reticulate,

E=pittedwithborder,F=pittedsimple

(C)A=annular,B=spiral,C=scalariform,D=reticulate,

E=pittedsimple,F=pittedwithborder

(D)A=spiral,B=annular,C=scalariform,D=reticulate,

E=pittedwithborder,F=pittedsimple

CORRECTANSWER:B

Q-57-13843484

Vascular tissues of angiosperms differ from those of gymnosperms

(A)presenceofvesselsinthexylem

(B)presenceofwelldevelopedsievetubesinphloem

(C)presenceofcompanioncellsinphloem

(D)allofthese

CORRECTANSWER:D

Q-58-16023289

Root cap in dicots is formed from

(A)Protoderm

(B)Groundmeristem

(C)Calyptrogen

(D)Procambium

CORRECTANSWER:A

SOLUTION:

Protodermistheoutermostlayeroftheapicalmeristem

whichdevelopsintotheepidermisorepidermaltissue

system.

Q-59-13843544

In temperate regions, cambium is less active during winter season

and forms fewer xylary elemetns that have narrow vessels, this

wood is called as

(A)springwood

(B)automnwood

(C)heartwood

(D)sapwood.

CORRECTANSWER:B

Q-60-16023506

Raphides are needle-like crystals of calcium oxalate which are

specially found in

(A)Pistia

(B)Rose

(C)Asparagus

(D)Dahlia

CORRECTANSWER:A

Q-61-13843479

Which of the following conditions of xylem is present in both

monocot and dicot stems?

(A)endarch

(B)polyarch

(C)mesarch

(D)exarch

CORRECTANSWER:A

SOLUTION:

Basedonpositionofprotoxyleminrelationto

metaxylem,thexylemmaybeexarch/centripetal,

endarch/centrifugal,mesarchandcenterarch.Inendarch

condition,protoxylemliesontheinnersideofmetaxylem

e.g.,dicotandmonocotstems.

Q-62-16023299

Term 'Leptome' is a synonym of

(A)CompanioncellsSieveelements

(B)Sievedelements

(C)Phloemfibres

(D)Phloemfibres

CORRECTANSWER:B

SOLUTION:

Haberlandt(1914)gavethetermLeptomeforsoftwalled

conductingpartofphloem(sieve-element).

Q-63-16023574

"Sap wood" is otherwise called

(A)Duramen

(B)Alburnum

(C)Pith

(D)Medullaryrays

CORRECTANSWER:B

SOLUTION:

Alburnumisanouterlightcolouredzonecalledthesap

woodwhicharephysiologicallyactive.

Q-64-13843523

Y-shaped arrangment of xylem vessel is found in

(A)monocotstem

(B)dicotstem

(C)monocotroot

(D)dicotroot.

CORRECTANSWER:A

Q-65-16023535

Palisade parenchyma is absent in leaves of

(A)Sorghum

(B)Mustard

(C)Soybean

(D)Gram

CORRECTANSWER:A

Q-66-16023321

Which of the following tissues consist of living cells

(A)Vessels

(B)Tracheids

(C)Companioncell

(D)Sclerenchyma

CORRECTANSWER:C

Q-67-16023444

A stele with a central core of xylem surrounded by phloem is called

or Actinostele is a modification of

Pith is absent in

(A)Protostele

(B)Siphonostele

(C)Solenostele

(D)Dictyostele

CORRECTANSWER:A

SOLUTION:

Protosteletermwasgivenbyjeffrey.Itisthesimplest

andmostprimitivetypeofsteleinwhichcentralcoreof

xylemsurroundedbyphloem.

Q-68-26855912

Anatomically jute fibres are

(A)Xylemfibres

(B)Corticalfibres

(C)Pithfibres

(D)secondarybastorphloemfibres

CORRECTANSWER:D

SOLUTION:

Anatomicallyjutefibresaresecondarybast/phloem

fibres.

Q-69-16023465

Bulliform or motor cells are present in

(A)Dicotstem

(B)Upperepidermisofdicotleaves

(C)Lowerepidermisofmonocotleaves

(D)Upperepidermisofmonocotleaves

CORRECTANSWER:D

SOLUTION:

Intheupperepidermis,therearesomelargecellsfound

ingroups,whichareknownasmotorcellsorbulliform

cells.

Q-70-13843496

In______vascular bundle, a strip of vascular combium is present in

between the xylem and phloem.

(A)open

(B)closed

(C)endarch

(D)exarch

CORRECTANSWER:A

SOLUTION:

Ingymnospermsanddicotstemsastripofvascular

cambiumoccursbetweenphloemandxylemofeach

vascularbundle.Itiscalledintrafascicular(orfascicular)

cambium.Thisstripofvascularcambiumlaterproduces

secodarytissues.Suchvascularbundlesaredescribed

asopen.

Q-71-16023411

Porous wood contains mainly

(A)Fibres

(B)Vessels

(C)Tracheids

(D)Solidsecretions

CORRECTANSWER:B

SOLUTION:

Porouswood(Inangiosperms)containsmainlyvessels.

Q-72-16023752

Pericycle in roots is responsible for

(A)Formationoflateralroots

(B)Proividingmechanicalsupport

(C)Formationofvascularbundlefromcortex

(D)Formationofvascularbundlefromendodermis

CORRECTANSWER:A

SOLUTION:

Indicotyledonousroot,awelldevelopedpericylcelies

belowendodermiswhichgivesrisetolateralroots,part

ofvascularcambiumandwholecorkcambium.Pericyle

funcitonsasthesiteoflateralrootinitiation.

Q-73-16023720

Assertion : Xerophytic leaves may contain stomatal crypts or

sunken stomata.

Reason : Spongy parenchyma is more in xerophytic leaves.

(A)Ifboththeassertionandthereasonaretrueandthe

reasonisacorrectexplanationoftheassertion

(B)Ifboththeassertionandreasonaretruebutthe

reasonisnotacorrectexplanationoftheassertion

(C)Iftheassertionistruebutthereasonisfalse

(D)Ifboththeassertionandreasonarefalse

CORRECTANSWER:C

SOLUTION:

Inxerophyticleaves,spongyparenchymaisreduced.

Palisadeparenchymamayoccuronbothupperand

lowersideswithspongyparenchymasandwitched

betweenthetwo,e.g.,Nerium.InNeriumorOleander,

thelowersurfacebearsdeepdepressionscalledcrypts

(stomatalcrypts).Thecryptspossessanumberof

cutinisedhairandstomata.Inotherxerophyticplants,

stomataoccurindividuallyandaresunkenbelowthe

surfaceduetotheirbeingovertoppedbyaccessoryor

subsidiarycells.

Q-74-13843494

Stomata which remain surrounded by a pair of subsidiary cells

whose common wall is at right angles tio guard cells are called

(A)anomocytic

(B)aisocytic

(C)paracytic

(D)diacytic

CORRECTANSWER:D

SOLUTION:

Diacytic(caryophyllaceous)typeofstomataare

surroundby2subsidiarycells.Diacyticsubsidiarycells

arearrangedatrightanglestothestomatacellse.g.,

saponaria

Q-75-16023638

The waxy substance associated with cell walls of cork cells is or

cork cells are imprevious to water becauce of the presence or what

is deposited on cork cells

(A)Cutin

(B)Suberin

(C)Lignin

(D)Hemicellulose

CORRECTANSWER:B

SOLUTION:

Afteractualfallingofleaf,thescarisexposedtoair,

whichdevelopsaprimaryprotectivelayerbydeposition

ofligninandsuberinontheirwall.

Q-76-13843555

Phellogen cuts off derivatives on the inner side to form ______and

on the outer side to form_____

(A)cork,secondary,cortex

(B)secondarycortex,cork

(C)corkcambium,cork

(D)corkcambium,secondarycortex

CORRECTANSWER:B

Q-77-16023726

Assertion : Bulliform cells are useful in the unrolling of leaf .

Reason : Bulliform leaves store water.

(A)Ifboththeassertionandthereasonaretrueandthe

reasonisacorrectexplanationoftheassertion

(B)Ifboththeassertionandreasonaretruebutthe

reasonisnotacorrectexplanationoftheassertion

(C)Iftheassertionistruebutthereasonisfalse

(D)Ifboththeassertionandreasonarefalse

CORRECTANSWER:B

SOLUTION:

Inisobilateralleaves,theupperepidermiscontains

sepcializedcells,i.e.,bulliformormotorcells.Theyare

highlyvacuolateandcanstorewater,ifavailable.

However,incaseofwaterdeficiencythebulliformcells

losewaterandbecomeflaccid.Asaresulttheleafgets

rolleduptoreducetheexposedsurface.thebulliform

cellsarealsousefulintheunrollingofleafduringits

development.

Q-78-16023623

Lenticel develops through the activity of

(A)Vascularcambium

(B)Dermatogen

(C)Phellogen

(D)Intercalarymeristem

CORRECTANSWER:C

Q-79-13843526

In a dorsiventral leaf, location of palisade tissue and phloem is

respectively on the ______surfaces.

(A)adaxialandabaxial

(B)adaxialandadaxial

(C)abaxialandadaxial

(D)abaxialandabaxial

CORRECTANSWER:A

SOLUTION:

Dorsiventral(bifacial)leavesarecommonlyhoriozntalin

orientationwithdistinctupper(adaxial)andlower

(abaxial)surface.Mesophyllisdistinguishableinto

palisadeandspongytissueswithpalisadeusually

restrictedtotheupper(adaxial)side.VAscularbundles

areconjointandcollaterali.e.,theypossessbothxylem

andphoemwhichlieonthesameradius.Xylemlies

towardstheupper(Adaxial)sideofleafwhilephloem

liestowardsthelower(abaxial)sideofleaf.mostofthe

dicotyledonousleavesaredorsiventral.

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