Zadanie 1a
State the independent variable.
- Materiał graficzny
Biology SL Paper 3, November 2024, TZ2
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 30 zadań z tego arkusza, razem 50 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (14), Evaluating biological evidence and methods (6), Planning a biological investigation (4).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Suggest a reason for the twelve-minute wait.
- Materiał graficzny
Zadanie 1c
Outline why temperature is kept at37 degrees C.
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Zadanie 1d
Suggest a conclusion supported by the results.
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Zadanie 1e
Explain one improvement to the method.
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Zadanie 2a
State the dependent variable.
Zadanie 2b
Explain why replicate plates are needed.
Zadanie 2c
Suggest why colonies can form despite antibiotic Z.
Zadanie 3a
Identify the pigment most soluble in the solvent used.
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Zadanie 3b
Describe how such a chromatogram can be obtained.
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Zadanie 3c
State how the Rf value is calculated.
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Zadanie 4
Specialized nerve cells develop during formation of the nervous system. Describe the formation of neurons.
Zadanie 6a
The table describes four hypothetical mammal species. Discuss whether brain mass is proportional to neuron number.
- Tabela do uzupełnienia
Zadanie 6b
The medulla oblongata contributes to physiological coordination. State one of its functions.
Zadanie 8a
Suggest conclusions about how pH affects the rate of cellulose hydrolysis.
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Zadanie 8b
Suggest one advantage of using microorganisms in this process.
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Zadanie 9
A hypothetical crop-development procedure uses a bacterial vector to introduce herbicide resistance. The table records a model production run. Calculate the number of germinated seeds as a percentage of the initial embryo number, assuming every collected seed…
- Tabela do uzupełnienia
Zadanie 10
A hypothetical bacterial strain is tested for removal of methylmercury from a culture. Bars show methylmercury concentration; lines show growth with and without methylmercury. Error bars on growth are model SDs. Evaluate whether the strain could be useful for…
- Materiał graficzny
Zadanie 11
Suggest two factors that could affect antibiotic action on this community.
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Zadanie 13
A hypothetical coral experiment compares three water temperatures. The scattergraph tracks symbiotic algal density over ten weeks. Using the data, explain the effect of temperature on coral bleaching.
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Zadanie 14a
State which species has the greatest increase in density between14 and18km.
Zadanie 14b
Describe a method for recording algal abundance along the river.
Zadanie 14c
Deduce which species could indicate relatively unpolluted water, giving a reason.
Zadanie 15a
The conceptual model relates terrestrial biomes to mean annual climate. Its boundaries are illustrative. (i) State the temperature range covered by the two desert regions together. (ii) State the precipitation range of tropical rainforest.
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Zadanie 15b
Two conceptual models compare nutrient stores and flows in biomes. Deduce which nutrient store is represented by Z, giving a reason.
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Zadanie 16a
Analyse the relationship between pollution and biodiversity.
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Zadanie 16b
Outline how a persistent chemical from the spill could become biomagnified in a marine food chain.
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Zadanie 17
A hypothetical farming programme proposes introducing a predator from another region to suppress a crop pest. Evaluate introducing an alien species as biological pest control.
Zadanie 18
A hypothetical mammal can synthesize metabolite U. Four experiments test candidate precursors P-S. The graphs show urinary output of U. An upward arrow marks the start of precursor injections and a downward arrow marks their withdrawal. Determine which…
- Materiał graficzny
Zadanie 19
The liver stores several nutrients. State one stored nutrient other than iron.