228377794-CSEC-Biology-June-2014-P2

8/17/2019 228377794-CSEC-Biology-June-2014-P2

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TEST CODE OI2O7O2O]|MAY/JUNE 2OI4CARIBBEANEXAMINATIONSCOUNCILCARIBBEAN SECONDARY EDUCATION CERTIFICATE@EXAMINATIONBIOLOGYPaper 02-General ProficiencY2 hours 30 minutesDO NOT TURN THIS PAGE UNTILYOU ARE TOLD TO DO SO.FORM TP 2014045 %.READ THE FOLLOWING INSTRUCTIONS CAREFULLY.2.This paper consists of SIX questions in two sections. Answer ALLquestions.For SectionA, write your answers in the spaces provided in this booklet.Do NOT write in the margins.For Section B, write your answers in the spaces provided at the end ofeach question, in this booklet.Where appropriate, answers should be illustrated by diagrams'

If you need to re-write any answer and there is not enough space to doso on the original page, you must request extra lined pages from theinvigilator. Remember to draw a line through your original answerand correctly number your new answer in the box provided.If you use extra pages you MUST write your registration numberand question number clearly in the boxes provided at the top ofEVERY extra page.3.3.4.5.6.Copyright @ 2012 Caribbean Examinations Council

All rishts reserved.| ililr ilil rilr il|il llill llllr ililr lilll lllll lllr ril llll01207020/F 201401207020031.Jl.aSECTION AAnswerALL questions.Write your answers in the spaces provided in this booklet.(a) Figure I shows drawings of different types of fish collected by marinebiologists who are

studying the distribution of organisms living in a marine ecosystem.Figure 1. Fish collected from a marine ecosystem(D Construct a table in the space below to classiff the fish in Figure I into groupsusing TWO visible features other than size.(3 marks)l il]il ilil il]ilril ililililililililil ilril ililil] il]o1207020/F 20140120702004GO ON TO THE NEXT PAGE


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-lI.re4," i->>=lta-->\ | 1z>- s^ e,v\->ilI@VItuSv@vIIvIII-3-(ii) A gill from one of the fish is shown in Figure 2. Annotate Figure 2 to illustrateTWO characteristics that make the gill suitable for gaseous exchange.(2 marks)Figure 2. Gill of a fish

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0120702006GO ON TO THE NEXT PAGE _li:i;it

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.:-:.:-:.:.:,rl:,-,.r,l-5-Figure 3 shows a food web that the biologists constructed to describe therelationships observed in this marine ecosystem'Predatory fishJellyfishZooplankton(microscopic animals)Sea grassPhytoplankton(microscopic plants)Figure 3. Food web in the marine ecosystem(i) Identiff TWO producers in the food web in Figure 3'(b)Butterfly/II'0"'\t 1\tlLoggerhead sea turtle

I\t \l\Crabs JeltYf"."n,".\\ tt /zooprrlP(microscoP\ ll\\tCorals with

zooxanthellae(iii)(2 marks)(ii) State TWO characteristics of producers in a food web.(2 marks)Corals are found in shallow waters and contain microscopic algae known aszooxanthellae which contain chloroplasts. The corals provide the algae with carbondioxide, shelter and protection, while the algae provide the corals with nutrientsand oxygen.Identiff the type of feeding relationship between the coral and the zooxan

thellaeand give a reason forYouranswer.(2 marks)GO ON TO THE NEXT PAGE| ililil ilil illl lllil lllll lllll lllll llil lllll lllil ffi |||l0120702007012070201F 2014-6-


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(c) At six-month intervals over a three-year period, marine biologists collected data on theestimated population size of parrotfish and a predatory fish. Table I presents this data.TABLE 1: ESTIMATED NUMBER OF PARROTFISH AND PREDATORY FISHOVER THREE YEARS(D Represent the data in Table 1 on a suitable graph on the grid provided onpage 7.(6 marks)(ii) Suggest an explanation for the differences in the shapes of the graphs.(2 marks)Name TWO features that the predatory fish may have that allow it to carry out itsrole as a predator.Suggest what the likely consequences wouldpredatory fish is NOT controlled.(2 marks)be if the population size of the(iii)(iv)Time (Months) Estimated Number ofParrotfishEstimated Number ofPredatory Fish

Jantary 20072 500 35June 20072 00040December 2007| 200 55June 2008I 100 80December 2008 970 95June 2009400 105December 2009 200 120

(2 marks)Total25 marksGO ON TO THE NEXT PAGEI lllill lll] illfl llil lllll il]t illililll ililt il||t ililil|o1207020/F 2014o't20702008rL-7:-'----------,

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i---*+'.\J\J TJI\ IW Irl-E T\D.1\. I TA\JP| ilril ilil ililt il|il ilil lllll lllll lllll lllll llll llil llll0120702009012070201F 2014-l':*:-.:,:.:,:i...:r.:lInr-8(a),Figure 4 shows an external view of the human heart.(i) Identif, the structures labelled A, B and C in Figure 4. Write your answers onthe lines provided in Figure 4.(3 marks)left pulmonaryarteryFigure 4. External view of the human heartExplain how the function of the heart may be affected by a blockage of thebloodvessel shown at X.

(2 marks)| illlll ill] ill|| il]t uil ilil illl illl llilr ilil l]l lill0120702010(ii)0r207020/F 2014GO ON TO THE NEXT PAGE:'rSE--:'-lr----:Ai:lS:iifi]-':-'.'-'--::-______--_--

:=-lS/,.-t/tu-9(b) Figure 5 shows blood vessels used to transport fluids around the body of a mammal.Blood Vessel ABlood Vessel Bf igure 5. Blood vessels in a mammal(D Which blood vessel, A or B, represents a vein?(iD Identifu ONE structure

function.visible in Figure 5 which helPs a(1 mark)vein to carry out its(1 mark)(iii) Explain how the structure identified in (b) (ii) allows the vein to fulfil its function.(2 marks)


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(iv) Diets high in saturated fats may lead to the formation of plaques inblood vessels.Explain how slrch deposits may lead to hypertension.(2 marks)GO ON TO THE NEXT PAGEililil|1 il1ilUflilililil ilfl ilil il|| ilililil il||0t2070201F 20140120702011r--7-ltuCapillaryvalveinnerlayer-outer laverI(d)-10-Figure 6 shows the transport vessels of a flowering plant.Figure 6. Transport vessels in a flowering plantIdentiff the vessels shown at Positions P and

Qin Figure 6.P...............4.... .(2 marks)Explain why plants do NOT need an organ like a heart in their transport system, and outlineONE mechanism by which plants move fluids through their transport vessels.(2 marks)Total 15 marks| ffiill u] il]t il]t iltil il]t ilil ilil ilil tilt il] ilr

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:jEl-1l:!d:.-.F--.----Fr{--.:iH-.-._.--r--_ ,..R.'i.i{--lr-\J--jitH::ttr:iil:i='..r3.- 11-(a) Figure 7 is a diagram of a nephron found in a human kidney'Figure 7. Diagram of a nePhronIdentiff the structures labelled A, B and C in Figure 7 and briefly describetheprocess that takes place in EACH of these structures'A...............Process(i)

EIProcess(ii) Name the hormone secretedwater in body cells.(6 marks)by the pituitary gland when there is NOT enough(1 mark)GO ON TO THE NEXT PAGE|ililtililililtil]tilil|illlllffi lllllllllllllilllllill0120702013or207020/F 2014I

12-(b)(iii) Explain why the composition ofurine produced at X would differ in someone whodrank a lot of wateriompared to someone who had no water to drink for over24 hours.(4 marks)Table 2 shows a comparison of the substances found in the urine of a healthy person andthat of someone who is diabetic.TABLE 2: COMPOSITIONOF URINE OF A HEALTITY PERSON AND OF ADIABETIC PERSON

(D Explain why there is glucose in the urine of the diabetic person, assuming that thekidneys are functioningProPerlY.(2 marks)(iD Describe TWO ways of managing diabetes mellitus.Substance7o in Urine of HealthYPerson7o in Urine of Diabetic


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r-13-SECTION BAnswerALLquestions-write your answers in the spaces provided at the end of each question'(a) With the aid of a diagram, outline THREE processes which return carbonto the atmosphereand ONE which removes it. (Include the form in which the carbon is foundin theatmosphere.)(6 marks)(b) Describe the impact of cutting down or burning large areas of forest on the recycling ofcarbon.(6 marks)(c) Suggest THREE ways in which humans can make changes in their day-to-day activitiesto reduce the amount of carbon in the atmosphere'(3 marks)Total 15 marksWrite your answer toQuestion4 here.

Space for diagram for (a)GO ON TO THE NEXT PAGE| ililt il] llll lllll lllll lllll lllll lllll lllll lllll llll llll0t2070201F 201401207020154.-t4-rWrite your answer toQuestion4 here.| il]il il] il]t ilil ililr ilil u|| il]t ililt il]t lil ill0120702016

GO ON TO THE NEXT PAGEo1207020/F 2014-15-Write your answer toQuestion4 here.01207020170r207020/F 20t4GO ON TO THE NEXT PAGEIf,. (a)(b)-16-

Define the terms 'genotype', 'phenotype', 'recessive'and 'dominant' (4 marks)(D Albinism (lack of pigmentation) is an example of discontinuous variation. GiveTWO examples of traits that show continuous variation. (2 marks)(ii) Aman with normal pigmentation and an albino woman produce two children, oneof whom is an albino. Using appropriate symbols, draw a genetics diagram toshow the genotypes of the parents and the expected phenotypes of the offspring.


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(Note that albinism is a trait caused by the inheritance of a recessive allele.)(5 marks)(c) Many of the antibiotics used to control tuberculosis are no longer effective. Use the theoryof natural selection to account for this.(4 marks)Total 15 marksWrite your answer toQuestion5 here.| il]il ililI ililt il]t ilril il]t ilil ililr ilil ililr llll llll0r2070201p 20140120702018GO ON TO THE NEXT PAGE-17 -Write your answer toQuestion5 here.0120702019ot2070201F 20r4GO ON TO THE NEXT PAGEl- -r8-I

Write your answer toQuestion5 here.| iltil ililt illt ililt iltfl ||til ililt ilil ililr illl lilt till012070202001207020/F 2014GO ON TO THE NEXT PAGEr6.-19-(a) (D Name THREE types oftissue which coordinate to bring about movement in animals,and state THREE reasons why it is important for animals to be able to move

.(6 marks)(ii) Explainwhy, unlike animals, plants are able to survive without moving fromplaceto place.(2 marks)(b) A father saw his son step down onto the tarmac and watched as he ran towards him.Describe the changes that occurred in the father's eyes to keep his son'sface in focus.(7 marks)Total 15 marksWrite your answer to

Question6 here.012070208 20r4L| ililil ilil ilil ilil llllr lllil ilil| lllll llill lllll illl llll0120702021GO ON TO THE NEXT PAGE-lâ¬>j,tr


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ts{..-20-Write your answer toQuestion6 here.|ililtililIililtilil illllllllllll il|illl|| lllil Iililill01207020220r207020/F 2014GO ON TO THE NEXT PAGE-l-21 -Write your answer toQuestion6 here.END OF TESTIF YOU FINISH BEFORE TIME IS CALLED. CHECK YOUR WORK ON THIS TEST.| iltil ilil ilil ililt iltil ilil ul| ililil]il ilil ilil iltl012070202301207020/F 2014L

228377794-CSEC-Biology-June-2014-P2

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