Zadanie 1a
State the percentage germinated in the control on day 12.
- Materiał graficzny
Biology SL Paper 2, May 2025, 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 22 zadania z tego arkusza, razem 66 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (7).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Sketch a plausible curve for seeds exposed to S for 64 hours.
- Materiał graficzny
Zadanie 1c
Compare and contrast the 16-hour treatment with the control during the investigation.
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Zadanie 1d
Suggest which feature is consistent with inhibition of respiration by S.
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Zadanie 1e
Evaluate the claim that eight hours is the optimum exposure duration.
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Zadanie 1f
State the increase in mean emission caused by S in dormant embryos.
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Zadanie 1g
Calculate the percentage increase caused by S in non-dormant embryos.
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Zadanie 1h
Compare and contrast the responses of dormant and non-dormant embryos.
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Zadanie 2a
A population of ground beetles varies genetically. Identify one process producing genetic variation.
Zadanie 2b
Repeated drought changes conditions in the beetles’ habitat. Explain how environmental change can alter natural selection.
Zadanie 2c
A predator acts as a keystone species in a coastal food web. Explain possible effects of losing this species.
Zadanie 3a
The diagram is a simplified model of a nerve cell communicating with a muscle fibre. Determine whether the axon is insulated, giving a visible reason.
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Zadanie 3b
The diagram is a simplified model of a nerve cell communicating with a muscle fibre. List two structures present in this neuron and also in a typical bacterium.
- Materiał graficzny
Zadanie 3c
The diagram is a simplified model of a nerve cell communicating with a muscle fibre. Describe the events that release neurotransmitter from the presynaptic ending.
- Materiał graficzny
Zadanie 4a
Lactose is split into glucose and galactose before absorption. State the type of reaction that splits this disaccharide.
Zadanie 4b
Monosaccharides enter a dense network of intestinal blood capillaries. Describe adaptations of capillaries for exchanging these small molecules.
Zadanie 4c
An absorbed monosaccharide crosses an epithelial membrane through a transport protein without ATP use. Outline how facilitated diffusion moves the solute.
Zadanie 5a
A barley cell copies and expresses its hereditary information. State the monomer from which DNA is assembled.
Zadanie 5b
Compare the usual cellular forms of DNA and RNA. Distinguish two structural features of DNA from RNA.
Zadanie 5c
In a model diploid plant, allele p gives a recessive pale-leaf phenotype and P gives the dominant green-leaf phenotype. Explain why carrying a recessive allele does not always produce its phenotype.
Zadanie 6
Water affects both plant physiology and the habitats of organisms. (a) Outline benefits to organisms arising from cohesion of water molecules. (b) Outline how environmental conditions influence transpiration. (c) Explain osmosis and its effects on plant cells.…
Zadanie 7
Carbon participates in molecular structures, ecosystem transfers and changes to the global environment. (a) Outline bonding properties that allow carbon to form many different molecules. (b) Describe processes that transfer carbon through an ecosystem. (c)…