Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 17 zadań z tego arkusza, razem 66 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Biological calculations, statistics and graphs (3), Chemical suppression of competitors (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawu(i) Identify the overall relationship between extract concentration and root length. (ii) Compare and contrast the effects on shoot height and above-ground biomass. (iii) Calculate the percentage change in total biomass from control to 12 mg mL⁻¹.
(i) Identify the microbial activity at 12 mg mL⁻¹ after six days. (ii) Describe how microbial activity changes as extract concentration increases.
Outline what the lower Simpson reciprocal index indicates about the soil community.
Discuss whether these results support the hypothesis that chemical effects on other plants or on soil microbes help an invasive plant establish.
Outline one property of monosaccharides and a biological function supported by that property.
Explain why less energy is available at each successive trophic level in this model.
Outline one biological importance of water’s high specific heat capacity.
A freshwater ciliate has contractile vacuoles. Outline why these structures are important.
Explain two adaptations that help a desert succulent persist in hot, dry conditions.
Compare and contrast the molecular structures of DNA and RNA.
Describe two kinds of DNA sequence mutation.
Explain how comparisons of DNA base sequences provide evidence for evolution.
Describe mixotrophic nutrition in an aquatic protist.
Distinguish parasitism from mutualism and give one example of each.
Explain how competition within a species contributes to natural selection.
Proteins contribute to structure, recognition and defence. (a) Outline the general organization of a peptide. (b) Describe the four ABO blood groups and their molecular/genetic basis. (c) Explain the adaptive immune response to invading pathogens.
Cell organization enables specialized reactions, and life cycles transmit inherited information. (a) Outline three structural differences between eukaryotic and prokaryotic cells. (b) Outline advantages of dividing a cell into compartments. (c) Explain sexual…
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