Zadanie 1a
State the year with the largest nest count for L.
- Materiał graficzny
Biology HL Paper 2, November 2025, TZ3
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 28 zadań z tego arkusza, razem 96 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (5), Evaluating biological evidence and methods (3), Pressure changes in breathing (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Compare and contrast the annual nest-count changes for L and G.
- Materiał graficzny
Zadanie 1c
Suggest limitations of estimating the whole annual population only from nesting observations.
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Zadanie 1d
State which species has the highest percentage of definite vessel injuries among stranded animals.
- Materiał graficzny
Zadanie 1e
Suggest a reason for variation in definite-injury percentages among species.
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Zadanie 1f
State the relationship between regional vessel abundance and injury proportion.
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Zadanie 1g
Outline why X is atypical.
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Zadanie 1h
Evaluate the claim that vessels cause most turtle deaths in this region.
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Zadanie 2a
State two primary defences of the human body against pathogens.
Zadanie 2b
Outline two reasons why some viruses evolve rapidly.
Zadanie 3a
Outline how myelin and nodes increase conduction speed.
Zadanie 3b
Compare and contrast simple diffusion and facilitated diffusion across a membrane.
Zadanie 3c
Describe how neonicotinoids disrupt insect synaptic transmission.
Zadanie 4a
Explain changes in pressure and solute potential when an initially non-turgid root cell is put in a hypotonic solution.
Zadanie 4b
Explain the generation of root pressure.
Zadanie 4c
State two growth-regulating phytohormones and their principal production sites in this seedling.
Zadanie 5a
Explain how diaphragm contraction brings air into the lungs.
Zadanie 5b
State another muscle group whose contraction contributes to inspiration.
Zadanie 5c
Outline the role of pulmonary surfactant.
Zadanie 6a
Use a Punnett grid or equivalent diagram to justify a1:1:1:1 phenotypic ratio from a cross between a plant heterozygous for leaf width and pigmentation and a narrow-leaved, green plant.
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Zadanie 6b
Explain whether crossing a plant heterozygous for symmetry and pigmentation (with the dominant alleles in coupling) with an asymmetric-leaved, green plant should also yield a1:1:1:1 phenotypic ratio.
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Zadanie 7a
Identify whether X is more closely related to B or C, giving a reason.
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Zadanie 7b
Define a keystone species.
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Zadanie 7c
Suggest how antibiotic treatment can disrupt a stable climax community of gut bacteria.
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Zadanie 7d
Outline one difficulty in applying the biological species concept to bacteria.
- Materiał graficzny
Zadanie 8
A cell-biology course connects carbohydrate chemistry with energy transfer. (a) Explain how carbohydrate structures relate to cellular properties and functions, using named examples. (b) Outline diverse cellular uses of ATP, giving examples. (c) Distinguish…
Zadanie 9
Molecular binding underlies both communication and metabolic regulation. (a) Describe complementary molecules in cell-signalling systems, with examples. (b) Explain causes and consequences of changes to enzyme active sites. (c) Outline how reversible changes…
Zadanie 10
Genetic information helps explain early life and guide present-day conservation. (a) Describe RNA structure and evidence supporting an RNA-first stage of early life. (b) Describe uses of DNA-sequence analysis in biodiversity conservation. (c) Explain causes…