Biology Upper Secondary Teacher Guide - Department of Education

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BiologyInterpret andanalyseexponentialgraphsQuestions like these could be asked to help students analyse andinterpret exponential graphs.• What is population?• What is a population graph?• How do you read a population graph• Where are the lag, log, and constant phases of the curve?• identify and label these phasesSuggested assessment taskCarry out population sampling using quadrat frame to estimate thepercentage cover of plant species.Assessment criteriaStudents will be assessed on the extent to which they can:1. plan and carry out sampling activity2. collect data3. interpret and present findings.Marking guideMarking guide for assessment task 12.2: Carry out populationsampling using quadrat frame to estimate the percentage coverof plant species20 marksCriteriaVHA(18–20)HA(14–17)SA(10–13)LA(0–9)Plan andprepare(3 marks)Excellent planningand preparation(3)Good planning and preparation (1–2)Inadequateplanning andpreparation (0–1)Conductexperiment(5 marks)Experimentscorrectly andconfidentlycarried out (5)Experimentscorrectly carriedout (3–4)Experimentscarried out(2–3)Incorrectexperiments (0–2)Interpretationand analysis ofdata (6 marks)Accurateinterpretation andanalysis of data(6)Goodinterpretationsand analysis (4–5)Soundinterpretationsand analysis(3–4)Unsatisfactoryinterpretationsand analysis (0–2)PresentationTitleNeat(3 marks)Title statedcorrectly and veryneat and tidy (3)Fairly neat andtitle stated (1–2)Neat (1–2) Untidy (0–1)Conclusion(3 marks)Very clear andconcise review ofthe topic (3)Concise review ofthe topic (2)Fair review ofthe topic (1–2)Inadequatereview pointsraised (0–1)40
Upper Secondary Teacher Guide12.3 GeneticsThis is an 8–10 week unit.Suggested activitiesA range of activities can be used to ensure students learn the expectedcontent knowledge of this unit, such as:• describe and explain the terms ‘inheritance’, ‘genotype’, ‘phenotype’,‘gene’, ‘genome’, ‘allele’• carry out research on Mendelian experiments• construct models of meiosis and mitosis using plasticine• demonstrate by means of models that DNA is a double helix structurecomposed of nucleotide units• investigate structure of chromosomes during DNA replication• research and interpret processes of protein synthesis• conduct an experiment to measure continuous variation in a population;draw and interpret graphs of weight or height• measure and draw graphical representations of discontinuous variationsuch as blood type, ear lobes, tongue rolling• carry out research and experiments with simple tissue culture techniquesusing carrots or other plant tissuesElaboration of contentThe following table gives elaboration of some activities from the list above.ActivityElaborationConstruct models of DNA(double helix structure)Research, design and carryout a simple experiment ontissue cultureStudents can do the following:• research and gather information on the structure of a DNA• gather appropriate materials• construct models• do presentationStudents:• gather materials (small discs of carrot or other plant tissue,an appropriate medium in a test tube)• place experiment in safe place and make observations overa period of 21–28 days• analyse and interpret data• present findingsSuggested assessment taskMeasure and draw graphical representations of discontinuous variation suchas blood type, ear lobes, tongue rolling.41
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Biology Upper Secondary Teacher Guide - Department of Education

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