Zadanie 1a
State which route contributes most to exposure in the youngest age group.
- Materiał graficzny
Biology SL Paper 2, May 2024, TZ1
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 60 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (6), Evaluating biological evidence and methods (3).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Estimate the contribution of water for children aged 1–3 years.
- Materiał graficzny
Zadanie 1c
Suggest how a change in behaviour or diet with age could alter the relative contributions of the routes.
- Materiał graficzny
Zadanie 1d
State the mean blood lead concentration in region A in 1982.
- Materiał graficzny
Zadanie 1e
Compare and contrast the changes in blood lead concentrations after the fuel-policy changes in the two regions.
- Materiał graficzny
Zadanie 1f
In this hypothetical monitoring programme, a cohort is flagged for additional investigation if its mean exceeds 40 µg L⁻¹. Outline which regional cohorts meet this rule from 2000 onwards.
- Materiał graficzny
Zadanie 1g
State which residential environment has the highest mean in 1990–1999.
- Materiał graficzny
Zadanie 1h
Predict, with a reason, how the missing heavy-traffic mean for 1980–1989 might compare with that for 1990–1999.
- Materiał graficzny
Zadanie 1i
Discuss how disposal of e-waste could affect children’s blood lead concentrations, using the datasets.
- Materiał graficzny
Zadanie 2
Explain why phospholipids form bilayers in water.
Zadanie 3
A model enzyme preparation hydrolyses a carbohydrate. The graph shows the percentage of enzyme molecules retaining activity as temperature rises. Use a simplified model in which hydrolysis becomes faster as temperature rises while nearly all molecules remain…
- Materiał graficzny
Zadanie 4a
Outline why meiosis produces haploid cells in a diploid sexual life cycle.
Zadanie 4b
Explain how meiotic nondisjunction can result in Down syndrome.
Zadanie 5a
A runner accelerates from a walk into a sustained run. Outline two internal mechanisms that can raise the runner’s heart rate.
Zadanie 5b
Explain how platelets help prevent pathogens entering through a skin wound.
Zadanie 6
(a) Outline how lipids serve as energy reserves in humans. (b) Describe how an oxygen concentration gradient is maintained between alveoli and blood. (c) Explain why sunlight supports the energy supply of a photosynthetic ecosystem.
Zadanie 7
(a) Describe the role of mRNA in polypeptide synthesis. (b) Describe why haemophilia is more frequent in males than females. (c) Explain how changes in chromosomes can contribute to evolution.