Zadanie 1a
State how many birds in R were learners by day 6.
- Materiał graficzny
Biology HL Paper 2, May 2025, 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 31 zadań z tego arkusza, razem 96 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (8), Living in water versus air (2), Pressures behind declining biodiversity (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Compare and contrast the learner-count trends for L and R.
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Zadanie 1c
Calculate the percentage increase in learners in R from day 3 to day 6.
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Zadanie 1d
Estimate how many right-slider openings were made by birds in L during the first six days.
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Zadanie 1e
Using the data, suggest which trained group opened the dispenser more efficiently, giving a reason.
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Zadanie 1f
Determine the percentage of L + R learners with a proficiency index of 36 or below.
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Zadanie 1g
(i) State the proficiency index of c7. (ii) Calculate the number of days c7 took to become a learner.
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Zadanie 1h
Justify the conclusion that birds can discover the mechanism without a demonstrator, but learners exposed to demonstrators generally become more proficient.
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Zadanie 2a
Distinguish two physical properties of water from those of air.
Zadanie 2b
Describe two physical adaptations that help a harbour seal live in water.
Zadanie 2c
State the trophic level occupied by the zooplankton in this feeding relationship.
Zadanie 3a
Explain how this channel contributes to an action potential.
Zadanie 3b
State one other category of gated ion channel.
Zadanie 3c
Outline why the phospholipids forming the bilayer are described as amphipathic.
Zadanie 3d
Outline how cholesterol affects membrane fluidity.
Zadanie 3e
Outline how fatty-acid saturation influences membrane fluidity.
Zadanie 4a
Outline two adaptations of xylem vessels for transporting water.
Zadanie 4b
Explain how water can still be pushed from the soil towards the leaves under these conditions.
Zadanie 5a
Distinguish innate immunity from adaptive immunity.
Zadanie 5b
Explain the difference in peak timing between the first and later exposures.
Zadanie 5c
Justify why viral structure allows different types of vaccine to be developed.
Zadanie 6a
Outline two ways this clearance could affect biodiversity.
Zadanie 6b
State one contributor to the present biodiversity crisis other than forest clearance.
Zadanie 6c
(i) Outline why the EDGE of Existence approach is useful for conservation. (ii) Outline one way rewilding can restore an ecosystem process.
Zadanie 7a
Using a Punnett grid, deduce the probability that one of their children inherits the disorder.
Zadanie 7b
Distinguish an insertion mutation from a deletion mutation.
Zadanie 7c
Explain how CRISPR–Cas9-based editing could change production of the defective protein M.
Zadanie 7d
Suggest why pluripotent cells may be more useful here than a lineage-restricted multipotent cell population.
Zadanie 8
A student compares flowering plants with mammals and examines their ecological interactions. (a) Distinguish the cellular structures typical of these groups. (b) Outline adaptations that allow animals to feed on plants and adaptations that defend plants from…
Zadanie 9
Biologists use inherited similarities and differences to investigate population change and relationships. (a) Describe how homologous structures provide evidence for evolution. (b) Outline the assumptions and use of Hardy–Weinberg calculations in a population…
Zadanie 10
Biological functions depend on molecular organization and coordination between body systems. (a) Describe how codons determine polypeptide structure. (b) Outline how photosystem structure supports its function. (c) Explain how blood pH can fall during activity…