
	Trending ▼ ICSE CBSE 10th ISC CBSE 12th CTET GATE UGC NET Vestibulares ResFinder

CBSE Class XII 2014 : BIOLOGY

8 pages, 99 questions, 0 questions with responses, 0 total responses,

	cbse12	+Fave Message
	Profile Timeline Uploads Q & A

Home > cbse12 > DELHI LOCAL Question Papers : CBSE Board Class 12 >

Instantly get Model Answers to questions on this ResPaper. Try now!
NEW ResPaper Exclusive!

Formatting page ...

6ts+. Series : OSR/I Code No. +fr=i. o o o o r Efi-grFrs, $^IIGr-I|B rr qEFrt red RolI No. 57tln I Candidates must write the Code on the title page of the answer-book. gtrqr q?qq,'{d nst-lr { togsy*r-rr { qfqd ys 8 t I stsqsw *t nr* E{R-gl+aq,r *'ge-goawffi gtr-ttt cirq o-rd fo'gs qrr-q:r { fo rm SrrttnFtu,rsil{ftTs{rv5su,r++q{d, sv{6'rmqiu, w4gqffi s{t nt;t-q:r si T6+ + ftrq 15 lffic irr {Frir flEqr rrqr r svr-v* or koqrr qrlfl { to.ts eq fuqr qr+'n r 10.15 q+ 10.30 qi ro ur* iqa }rq"r-rEr Et qti elY{ Eq orqfu + qkH a v+r-gk*r q{ 6t$ Eff reT ftrfi gtB+ 6rq *t o+{ tqq qq r t r 1 t t r o o o o o Please check that this question paper contains 8 printed pages. Code number given on the right hand side of the question paper should be written on the title page of the answer-book by the candidate. Please check that this question paper contains 30 questions. Please write down the Serial Number of the question before attempting it. 15 minutes time has been allotted to read this question paper. The question paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the question paper only and will not write any answer on the answer-book during this period. Efr{Pd{mffiffi) BIOLOGY (Theory) fuiffrdaqq :s Eitl t qftrqdq eiq Time allowed: 3 hours l :7A I Macimum Marlcs : 70 qrqrqfiT+vr: (i) a*ywarMt r (ii) wswr-w dvrrsacA, t B, C eitn S I orsa if ywd'Fa.l+ynlrywWd6t, sr B ilto yw fifipm'e74r##Em'd svgC ilg yw$F?-d'rdCI-#ahsr#'# dqrsv D ilS swfiFmil+rdr#qfqgi+-,t t (iii) (iv) 57tut ol{ aqq aqq-fu Taiarwia qrg,r, 6rm*t n6r.* t fu rtt 2 riql ad Wsw 4 s eieif ard V6sw C ailrs *Tn a*srn + az+fu &q?r,d / dC'rr# q Harut w *qdq+-Ei tqq-@ w frr frT t # u76i r# atra?qr?-dl, q-d7q-Er+ak+.antg ffi vrr'-g'qt dqT sfFqd w ;f arqibd df t lP.T.O. r_ General Instructions : (i) (ii) All questions are compulsory. This question paper consists of four Sections A, B, C and D. Section A contains 8 questions of one mark each, Section B is of 70 questions of two marks each, Section C is of 9 questions of three marks each and Section D is of 3 questions of five marks each. (iii) There is no overall choice. However, an internal choice has been provided in one question of 2 marks, one question of 3 marks and all the questions of 5 marks weightage. A student has to attempt only one of the altematives in such questions. (iv) Wherever necessary, the diagrams drawn should be neat and properly labelled. EIU<T. A 1. ss +q SECTION - A qrq i[T flmfuqffi 'tir]iT sr snds" qor qror (1x8=8) t I I Write the name of the organism that is referred to as the 'Terror of Bengal' 2. q\if { IM +dvrrlfr irsqi + sftrrqq { qdqm fuqqil qrd 'qrwGrfr}Frfi Ei{EFq' Ffi erat r What are 'true breeding lines' that are used to study inheritance pattern of traits in plants ? 3. t* Hf d wnn q+ siflyrq.rcTt *'qrq ft{fuq ui qrrdi ii me ntdiqTr rqm q,,r+ + frq qiffiq erdirfr' *'sqiim,d+'q*t r Name any two types of cells which act as 'Cellular barriers' to provide Innate Immunity in humans. 4. yt wQS siftffir Iii Ei{+l st qrq frfisq qi *^rs1T +rrq it Brgffi aict t ffi ffi DNA ftt y+vr qrn+ + fuq +{ r Mention the type of host cells suitable for the gene guns to introduce an alien DNA. 5. ffi m qti{iir { w"r *,i fu ronfirsfre floqr qrar t r How is 'stratification' represented in a forest ecosystem 6. ffi qs'tS +{ ffi yqt-5qur *f.Tq Eil BT{fr Cs|qr+$ Tatqrwlo'wrt ? ercren { qar ETrin 61trT t, ofu qflr{q r Give an example of an organism that enters 'diapause' and why. 7 . *i fqq qr {t fu* + ffi wrt q6qnq"reiTr{q Identify 'a' and gq H*6s1 tqqm+ dr erqqmro M qqt+ ,nft *, .u,, E[q' e5:, I 'b' in the figure given below representing proportionate number of major vertebrate taxa. Hkd Erirgq)qoT EFTi Ei qFT qrkTr t, eilw r State the cause of Accelerated Eutrophication. EITg. B 9. 10. SECTION - B (2x10 =20) + sTIirT Ei qr+ + q{il q6d rtqreif HEr scrfti if qore q,r i{frrdr frfu q6 *;1 Eri"Telqrfrrt 2 Why do algae and fungi shift to sexual mode of reproduction just before the onset of adverse conditions ? qfuflm Evrrcit *'tS t ? ffi qi qhii + etq {qrur irrFr rrqr &qd fri *t +'qfipTrq tt qrqr wr fu'Bqrt qr*1q Hqror 50% fi t qer- (i) (ii) + w*q{ ffid HqM + I $s{ur r \'*.q+eq,t *t qttrdr t {qrr"r sT flrsrq mrTEq tqtrq{s{q*'ssrT5tqprftrfuq I I 2 A cross was carried out between two pea plants showing the contrasting traits of height ofthe plant. The result ofthe cross showed50Vo ofparental characters. (i) Work out the cross with the help of a punnett square. (ii) Name the type of the cross carried out. tP.T.O. r 11. qffq1 q *+ r rrc ABo {frT vq6t fir t+q ffi'R fuiil .rcsfrq ifiT Ftt sqtq Etilr t frfisq Ei-dT t ? HIaT ffi qifrIfiri}it 6 6stt 2 t sTqr.n frqfrftro ffi qfi'sql6{ur S (o (i0 { q* qri qFft ftrT-fut{ur ffiqRT +rsrit*'qrq {tqq ftnqq r rdq'st gq: t rrffi xx sT {t xo *'qrq qrqr zw sT T{ zz *'qrq the effect the gene How does the gene 'I' control ABO blood groups in humans ? write has on the sffucture of red blood cells. OR show' Give an Write the types of sex-determination mechanisms the following crosses example of each tYPe. Female XX with Male XO (i) (ii) tz. (0 (ii) (i) (ii) Female ZW with MaleZZ sq ffiffi sr qrq fdfisq ffi tqYfftq*thrqtrq {6 k sIIqR rR gsTq f<qt qr fr elTiRrr t {s tmd' w qgqr c-sb fqw it wgrEe p #+ niffiltelB+t + 1 2 be made Name the scientist who suggested that the genetic code should combination of three Explain the basis on which he arrived at this conclusion. of a \ nucleotides 13. qdfrFitti eiil:Iprfitmr i?IItTEtdIt, ftfigg lEtt*, rs'RtEtiftTfqqrqtvoart I ? 2 can be ove(come ? State the disadvantage of inbreeding among cattle. How it t4. qfi' BtrTffi e-qrflq tt gU ur*rtq tr ffi ikflr tiffiffiqr Explain with the help of a suitable example the naming of 15. .-d*g tqr 4q pr *1 qo qrq wT a kqt'rqr t 2 restriction endonuclease' qtr fo tqtMfirqq etTEfiffi +} q+. mrsrfr ffi1t{t {fl6s. flt{qr rrqr iTlPq'Es$**itmr"t+trfiDNA*t{qTiidfitd|oqqrq*.r2 cloning vector to transfer State how has Agrobacterium tumifuciens been made a useful DNA to plant cells. 16. g6W efl{ tmftrcqqrEqffi qffiq qfli5qr e1 qnsl+ ffi q+ g$ fur*'l+ E} t 2 of human population' Construct an age pyramid which reflects a stable growth status t7 . 3{ER riqmr sT qr{ di + qftf{fi, t*+-qlrgffivcrer | q{qaTfi st stt rt T6 Toi afrsTt ** t' r <16{or tt gq important roles' Mention Apart from being part of the food chain, predators play other any two.such roles supported by examples' 57lut 2 18. qr qq'fqqqqnfist' ffi+ t r stzrr=nq qq} fqiqr rrqr r How are 'sticky endso formed on a DNA strand ? Why are they DNA ar+ 2 so called ? E!ir- c SECTION-C 19. snqilSfrdiqitrttyrqt++qrdftt$+{r4lrTqtrgn{q I (3x9=27') 3 Explain any three advantages the seeds offer to angiosperms. 20. qFffirp{iyrqsiffiHqr+q*tffif*-=rn+silEqqqYt*11ffffiTt{rqEnEg r 3 Name and explain the role of inner and middle walls of the human uterus. 21,. \rs'HlrtrerTmqrqfu+qEiq+.qtttq Crtiti) v.qrt{rWTr lgs{s-{urERrEqf-{qfls,'t$++ 3 {qqgaT 1E$F+H,ftTrrwttqr? SPrET +s + Hq{"it si iivrmfr vrls-+ rrq sTq+ g'Fr *,r FFr{FT 186s + f+qr qr, q{q q qr+ { tt +ii g$, foa1 qrqr{ tl=rr {6r r ss*'m, q st s,RuI {friEg {ffi fr 1900 trF {6 r A colourblind child is born to a normal couple. Work out a cross to show how it is possible. Mention the sex of this child. OR Mendel published his work on inheritance of characters in 1865, but it remained unrecognized till 1900. Give three reasons for the delay in accepting his work. 22. *i t eFilr{ strai si fi qiq kqr qnr w t t*,'s,T+'qqr wn' * *ii iqr r qftunfiarsq srb qTE 3r$ffi qEr6R ?TplT $rdil qBsR t*qr qmr ror r errr e{rq+} futrEr dr q{ tS qTTfii t flknrydt+dnt{{Frrrffodnq*,,dEinii e{rqndo,ti ? { 3 Women are often blamed for producing female children. Consequently, they are ill treated and ostracized. How will you address this issue scientifically if you were to conduct an awareness prograrnme to highlight the values involved ? 23. (a) (b) qfuq qrrfr + s'n+ qri qA ssmfuftflqq+ ftt tsg sr =nq fldfuq I qs+H-n ftt rJqrdr N qe{rfr Trfr qt Ttr{ qrfr { vnqr qrfrr t ? ffii{fufr drliror { "r", "b" Hstr 'c.';r q[ qCqrq 6{ {dr{q a +Tr t' : w rr+ e ITGIT r5'{rfi fus I dk*l THr 2. qrA +q {sr tq 2 rfrrq +te+so, (a) (b) wrtq I J. (c) wrH+rt wA-4 57tut q?rHHstr x6'fi+{fi, 3 lP.T.O. (a) Name the tropical sugar cane variety grown in South India. How has it helped in improving the sugar cane quality grown in North India ? 'a','b' (b) and 'c' in the following table : No. Crop Variety Insect Pests I Brassica Pusa Gaurav (a) 2. Flat bean Pusa Sem 2 (b\ Pusa Sem 3 (c) 3. Pusa Sawani Pusa 24. Shoot and fruitborer A-4 ffi tt gwa Erm +dnq, qgqlffirii+Erit st Htttrr qrfrr t t Qt f*- i d F-{rm &it *^qpT tdfuqwr qtrFlrFT *m t Fvm r Why are beehives kept in crop field during flowering period ? Name any two crop fields where this is practiced. 25. nNl aqftr+pr ftt yiffiT *'rn Fh'RHEr{rflrfirs z q{flEg { HrqT-{'+ qhit dr wgt +tzts *- rta;q"r ii eFrT gld+ t fuq I How did the process of RNA interference help to control the nematode from infecting roots of tobacco plants ? Explain. ++ frn'ri qrs'HT itzr+T dfuq t e "kXSqT {trFit *^sfffrkq : E & E F qrq(t) J (i) qir(a) qe &l ii eil6K eil{FrHq+E{nrdrqg (ii) qrqft{qi q+ EfliEn 3r$ffi *t q{n t, Eq qi { t rm,ti +tq qr w'Tfi'RrfiR{qfl dr sfr ? (iii) nqq st x-eTqT qr tqqqr GII iEr ErFr fldr{g I 57|UL I rrzn t ek ss*'sq{ qo Hqirr kS tqr qqi* 'rqt t 6 I W frg Study the graph given below and answer the questions that follow t e : F( a 2 ri n 2 o tsr FI F" o Crl (i) (ii) (iii) 27 ' (i) (ii) (i) (ii) write the sratus orfood -o rrr.JH':*, which;;" L"::;:'|lTr[X,:"ff11', (a) and (b). ;; the two curves wourd appropriatery Time has been shown on X-axis and there is a parallel dotted line above it. Give the significance of this dotted line. sHfu6 ssrffiT {rqFT frE+ sd t r &n+a rs,R *.qrftiir} dTwqrqfrrfi^ggnqnT{qmqqr+T6ldrt, ,T,!|'Jr'*ary { rr fuq-firq wi e}at t r frfuq I productivitv ? whv does ir vary in different types of 3 eco- State the reration between gross and net primary productivity. Err{t_ D SECTION , 28. (a) ilfr'rn sr EeT BliqRrqTryqt Eidr wefu^uq{qs61rqt t (b) {rfil+s*qrfrqRqq*w6}q*-*.raqw*.r*qihil r wttsr D qq} s.6r e+rteqal-qq I #J; - ls) 5 STEr{T (a) qa$ q +fiT{trT irF, ?k st t q-rrq-q1 Efu +1 qa-r { etwr* 15 wem. fi+r +dI t tsr +t tlnr t r (b) qFFr sTwrwq *-m,ra Rq s,r enire Tftq ojt{ w{ erq{qrcTf, +rsru1 mn '-r BFFT 3c? qqtr 'rr-,'-r gco sr+sqfuqqorilqtffisliqq | (a) palm is monoecious, while date palm is dioecious. why are they so ffr"Hr (b) diagram of sectional view of a mature embryo sac of an ffi;*:elled (a) (b) s,ltll How is 'oo*enesis' markedry:jtt;r:r, from ,spermatogenesis, with respecr ro the growth till puberty in rhe humans ? ffi;o:'::r;:;T.H:human ovary and raber the different forricurar srages, 7 ,*'T'o' zg. (a) qo*q-qr sTltq*tvor{rff* pNa sfrrffrft1vtffirqrsn{q (b) gffi il qifrror-q*'ft1 lns qrErcqr { vftrffr Et'fr lJfr*,rfu{FHftTEldr*wrtt'n t 5 t t r qfr oNe ffi * qK 5 srclztt (a) qs'qfffi (b) sq6lpi it gq srfr{ 6T +d-ksr *+t fu iil qqflEq qqqRW (two key concepts) qArE( sq +qscrm xrqq frt stt e[tt *r r flvqm | M^ frfrqq + WT q} "t \'{ +fu \,ftqr *'.ns td {6r v,ttn (a) Explain the process of DNA replication with the help of a schematic diagram. (b) In which phase of the cell cycle does replication occur in Eukaryotes ? What (a) O) 30. (a) would happen if cell-division is not followed after DNA replication ? OR Explain Darwinian theory of evolution with the help of one suitable example. State ttre two key concepts of the theory. Mention any three characteristics of Neanderthal man that lived in near east and central Asia. ffi dflfqdt +1sq oTq i[ T{E ftt t*,.+ +$ + fr e,rdrcrftI s *dfir+l$T;nEr ftfuq if qifua Fq?it qt cB T{ rmh 6-{ q# r ss iro{m *'rnr y;{aif +rqth { m qr+qr&wuilstq.*ffirgq H t (b) *,rfr*,, {'a,{ fuq r*T t mq H vnt t t . swl?tt (a) qTqi + +'il { *vt !r-+,'Fcifr{-r rFrFtiF'rt'r t r {s ltr + {Eitr i[ 'q{i' {iEfi' (b) di t qqgrEq t qrrTrq ft)frr*,re+ if qrar+ rrg FT +ii B+{tqr Yq*^ERr +* Eldr t, ffisq I eeftgm|fuq'a: wr + {rqa sT =nq leftqq ffi {ffi{ +qr 5 HqT d wT n t (c) t* Rnfi qt il*,+q;t *'qrq frfuqEil trrS ei'ii +iit{nf *t qeem { Bq+fr *& * (d) *T{ liffi *t srqr *^ irivr *'sq if e{w{ cr-'Stq Bif ftqr qrer t r (a) Name the technology that has helped the scientists to propagate on large scale the t O) (a) O) (c) (d) sTtut desired crops in short duration. List the steps carried out to propagate the crops by the said technique. How are somatic hybrids obtained ? OR Cancer is one of the most dreaded diseases of humans. Explain 'Contact inhibition' and 'Metastasis' with respect to the disease. Name the group of genes which have been identified in normal cells that could lead to cancer and how they do so ? Name any two techniques which are useful to detect cancers of internal organs. Why are cancer patients often given o-interferon as part of the treatment ?

Formatting page ...

Additional Info : CBSE Class XII Board Solved Question Paper 2014 Biology
Tags : CBSE Board 2015, Specimen Question Paper 2014 Science, Biology, solved sample mock guess question paper, cbse class XII syllabus, cbse class 12 previous years model papers., cbse, cbse papers, cbse sample papers, cbse books, portal for cbse india, cbse question bank, central board of secondary education, cbse question papers with answers, cbse model test papers, solved board question papers of cbse last year, previous years solved question papers, free online cbse solved question paper, cbse syllabus, india cbse board sample questions papers, last 10 years cbse papers, cbse question papers 2014, cbse guess sample questions papers, cbse important questions, specimen / mock papers 2015., cbse, cbse papers, cbse sample papers, cbse books, portal for cbse india, cbse question bank, central board of secondary education, cbse question papers with answers, prelims preliminary exams, pre board exam papers, cbse model test papers, solved board question papers of cbse last year, previous years solved question papers, free online cbse solved question paper, cbse syllabus, india cbse board sample questions papers, last 10 years cbse papers, cbse question papers 2017, cbse guess sample questions papers, cbse important questions, specimen / mock papers 2018.

cbse12 chat

Horizontal lines at:
Guest Horizontal lines at:
AutoRM Data:
Box geometries: