Zadanie 1a
Identify the independent variable.
Biology HL Paper 3, May 2024, 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 41 zadań z tego arkusza, razem 91 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (7), Evaluating biological evidence and methods (7), Planning a biological investigation (6).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Identify two variables kept constant.
Zadanie 1c
Explain two changes that would improve this investigation.
Zadanie 2a
(i) Suggest a research question that could be investigated with this equipment. (ii) Identify two variables to control.
Zadanie 2b
Discuss precautions needed for a safe and ethical investigation.
Zadanie 3a
Outline the effect of extra carbon dioxide on growth of the red alga.
- Materiał graficzny
Zadanie 3b
Suggest why growth in the tanks exceeds growth in the field.
- Materiał graficzny
Zadanie 3c
Describe how the algae’s photosynthetic pigments could be identified.
- Materiał graficzny
Zadanie 4a
Compare and contrast female behaviour when each male form is present.
- Materiał graficzny
Zadanie 4b
Suggest an advantage of the quieter male strategy.
- Materiał graficzny
Zadanie 4c
Suggest an evolutionary advantage of retaining both male forms in the population.
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Zadanie 5a
A comparative model represents seventeen mammal species. State the relationship between the two masses.
- Materiał graficzny
Zadanie 5b
Several functions of the nervous system involve the cerebral hemispheres. State two functions of the cerebral hemispheres.
Zadanie 5c
A student learns a new route through a virtual maze and later recalls it. Outline the relationship between learning and memory.
Zadanie 8
Neurons in a network communicate across chemical synapses. Explain how impulses are transmitted between neurons.
Zadanie 9a
Outline evidence that the gene transfer worked.
- Materiał graficzny
Zadanie 9b
Evaluate the evidence that the treatment was effective over eighteen months.
- Materiał graficzny
Zadanie 9c
Outline how a viral vector can change a target cell genetically.
- Materiał graficzny
Zadanie 10a
Identify one variable to control during cultivation.
- Materiał graficzny
Zadanie 10b
Explain possible causes of the decline in product concentration.
- Materiał graficzny
Zadanie 11
Plant genomes can be modified to produce useful traits. Using one named example, outline an advantage of genetic modification in plants.
Zadanie 12
Biofilms have consequences for medicine and technology. Outline properties of biofilms.
Zadanie 15a
List two types of biological molecule that could contain the tracer in coral tissue.
- Materiał graficzny
Zadanie 15b
Compare and contrast nitrogen transfers by the two coral forms.
- Materiał graficzny
Zadanie 16a
Outline two ways their niches may differ other than preferred temperature.
Zadanie 16b
Suggest how regional warming may change the distribution of species S.
Zadanie 16c
Predict outcomes where the species’ niches overlap.
Zadanie 16d
Discuss benefits and risks of controlling disease-vector mosquitoes with DDT.
Zadanie 16e
Outline environmental concerns caused by large plastic debris entering seas.
Zadanie 17a
Describe energy flow through this fish-farming system.
Zadanie 17b
Suggest two harmful consequences of adding more feed than the fish consume.
Zadanie 18
Conservation programmes can combine several strategies. Outline the use of ex situ conservation.
Zadanie 19
A coastal authority must decide how much harvesting a wild fish population can support. Discuss how assessment of wild fish populations can support sustainable fishing.
Zadanie 20a
Compare and contrast the results for the two groups.
- Materiał graficzny
Zadanie 20b
Explain how ventilation rate is controlled in humans.
- Materiał graficzny
Zadanie 22
The stomach has specialized secretory cells. Outline the contribution of stomach acid to digestion.
Zadanie 23a
State its function.
Zadanie 23b
Describe the cause of the sound as the ventricles begin to relax.
Zadanie 23c
Explain how stimulation brings about atrial and ventricular contraction.
Zadanie 24
The hypothalamus contributes to coordination within the body. Outline two regulatory functions of the hypothalamus.
Zadanie 25
Hormones differ in chemical structure and in how they interact with target cells. Compare and contrast the action of peptide hormones and steroid hormones.