Zadanie 1a
Estimate the difference between the highest and lowest mean body temperatures.
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Biology HL Paper 2, May 2022, 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 27 zadań z tego arkusza, razem 80 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Biological calculations, statistics and graphs (4), Evaluating biological evidence and methods (4), Recording and interpreting biological data (3).
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Dodaj cały arkusz do zestawuZadanie 1b
Compare and contrast the ambient and body temperature patterns during year 2 (months 6–17).
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Zadanie 1c
Explain the reduction in heart rate during hibernation.
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Zadanie 1d
Distinguish the age-related patterns of bone porosity in the two species.
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Zadanie 1e
The typical human lifespan used in this model is 85 years. Estimate the bone porosity of the human observation representing age 34 years.
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Zadanie 1f
Suggest one reason for expressing age as a proportion of typical lifespan rather than in years.
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Zadanie 1g
Describe the bone turnover pattern during hibernation using the R and F data.
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Zadanie 1h
Suggest how the R and F graph might differ for a human undergoing prolonged inactivity and bone loss.
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Zadanie 1i
Calculate the percentage increase in mean peptide P from before to during hibernation.
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Zadanie 1j
Evaluate the evidence for the hypothesis that a rise in hormone H causes peptide P to increase.
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Zadanie 1k
Discuss how helpful these model studies could be for understanding bone loss in humans.
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Zadanie 2a
Calculate the increase from 1885 to 2015.
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Zadanie 2b
Outline why a short interval could give a misleading impression of long-term climate change.
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Zadanie 2c
Explain how increasing atmospheric carbon dioxide strengthens the greenhouse effect.
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Zadanie 3a
State the approximate potential at X.
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Zadanie 3b
State what occurs when the threshold is reached.
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Zadanie 3c
Describe ion movement during the rising and falling parts of interval t.
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Zadanie 3d
Explain how the signal can pass from this neuron to another neuron.
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Zadanie 4a
State the level of protein structure represented by association of the chains.
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Zadanie 4b
Explain the shape of the chain in region X.
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Zadanie 4c
Outline the role of tRNA during synthesis of a chain in this complex.
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Zadanie 5a
Outline why X and Y are described as antagonistic.
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Zadanie 5b
Describe the role of muscle Y.
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Zadanie 5c
Outline one difference between the skeletal attachment of these muscles and human skeletal muscles.
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Zadanie 6
Water has physiological roles in both plants and mammals. (a) Outline how water’s properties allow evaporation to cool an animal. (b) Describe how weather affects the movement and loss of water in a terrestrial plant. (c) Explain how a dehydrated mammal…
Zadanie 7
Stem-cell properties and mitochondrial energy conversion have important biological applications. (a) Outline reasons why stem cells may be useful therapeutically. (b) Explain how the mitochondrial electron transport chain contributes to ATP formation.
Zadanie 8
Nucleic acids underlie inherited biological variation. (a) Draw and label one RNA nucleotide. (b) Describe how DNA profiling can be used to investigate paternity. (c) Explain why human adult heights vary.