Zadanie 1a
(i) State the food category providing 6% of fibre in the higher-fibre group. (ii) State the percentage supplied by fruit in the lower-fibre group.
- Materiał graficzny
Biology SL Paper 2, Specimen 2025
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 21 zadań z tego arkusza, razem 66 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Evaluating biological evidence and methods (4), Recording and interpreting biological data (3), Comparing plant, fungal and animal cells (2).
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Dodaj cały arkusz do zestawuZadanie 1b
Compare and contrast the proportional sources of fibre in the two groups.
- Materiał graficzny
Zadanie 1c
Explain whether these data determine which group eats the greater mass of whole grains each day.
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Zadanie 1d
Suggest one food category that could be increased in the lower-fibre diet, giving a reason based on the chart.
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Zadanie 1e
Compare the associations of increasing fibre intake with total energy intake and the percentage of energy supplied by fat.
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Zadanie 1f
The fibre fraction considered here is not digested for energy by human enzymes. Suggest why fibre intake can nevertheless correlate with total energy intake.
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Zadanie 1g
Discuss whether the results support the claim that higher-fibre diets are healthy for these children.
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Zadanie 2a
State two membrane-bound organelles found in both typical plant and animal cells.
Zadanie 2b
(i) State one organelle characteristic of plant cells but absent from typical animal cells. (ii) State one organelle present in both prokaryotic and eukaryotic cells.
Zadanie 3a
Identify two visible features distinguishing this DNA model from typical RNA.
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Zadanie 3b
Explain the significance of complementary base pairing in DNA.
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Zadanie 3c
Distinguish the main chromosome of a bacterium such as Escherichia coli from nuclear chromosomes of a typical eukaryote.
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Zadanie 4a
Identify the monomer used to form cellulose.
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Zadanie 4b
Explain how cellulose structure supports its functions.
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Zadanie 5a
Explain the ecological relationship between the bird and the flowering plant.
Zadanie 5b
State one way a plant can attract an animal pollinator.
Zadanie 5c
Suggest a behaviour that could reduce predation risk while a small animal is feeding.
Zadanie 6a
Outline how sex is usually determined in humans.
Zadanie 6b
Explain how sexual reproduction produces genetic variation.
Zadanie 7
Changes in genetic material can have different consequences. (a) Outline how mutations can contribute to cancer. (b) Outline one human disease caused by an autosomal recessive allele. (c) Explain the role of mutation in evolution. One additional mark is…
Zadanie 8
Animals must function under changing environmental temperatures. (a) Explain mechanisms of human thermoregulation. (b) Explain how temperature affects enzyme activity. (c) Distinguish the thermal properties of air and water in relation to animal habitats. One…