Zadanie 1a
Deduce, with a reason, whether the differences between fossil-layer mean densities are likely to be statistically significant.
- Materiał graficzny
Biology HL Paper 2, May 2026, 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 28 zadań z tego arkusza, razem 96 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Evaluating biological evidence and methods (4), Biological calculations, statistics and graphs (3), Water loss during leaf gas exchange (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Outline the trends as interval P ends and interval Q begins.
- Materiał graficzny
Zadanie 1c
Identify the relationship between site temperature and shrub stomatal density.
- Materiał graficzny
Zadanie 1d
Suggest two reasons for the difference in stomatal density between shrubs in hotter and cooler habitats.
- Materiał graficzny
Zadanie 1e
State the greatest upper-epidermis stomatal density among wild grasses grown at 430 ppm CO₂.
- Materiał graficzny
Zadanie 1f
Suggest one benefit of reducing stomatal density when atmospheric CO₂ is more abundant.
- Materiał graficzny
Zadanie 1g
Deduce whether the paired-density data support the hypothesis for the upper or lower epidermis in each grass group.
- Materiał graficzny
Zadanie 1h
Predict how stomatal density may respond to rising atmospheric CO₂ and temperature, using evidence from any of the supplied datasets.
- Materiał graficzny
Zadanie 2a
Deduce which process is represented in this early stage of a bacteriophage lytic cycle.
- Materiał graficzny
Zadanie 2b
State two processes supplied by a host cell that a virus requires during lytic reproduction.
Zadanie 2c
Justify both a cellular origin of viruses and the possibility of several independent viral origins.
Zadanie 3a
Identify two abiotic variables that influence whether woodland or grassland develops at a site.
Zadanie 3b
Using interspecific competition and ecological niches, predict the future survival of R and S across this region.
Zadanie 3c
Root cells of species S contain 24 chromosomes. (i) State the chromosome number expected in its leaf cells. (ii) S and R can form fertile F₁ hybrids. Predict the diploid number in these hybrids and give a reason.
Zadanie 3d
Species S produces toxic compounds in its leaves. Outline one benefit of this production to the plant.
Zadanie 4a
State one plant hormone associated with production in shoot tips and one associated with production in root tips.
Zadanie 4b
Outline the response of a young shoot when illumination comes mainly from its left side.
Zadanie 5a
Distinguish autotrophic from heterotrophic nutrition.
Zadanie 5b
The diagram shows selected inputs and outputs for one goat. (i) Identify gas X and the process in the goat that produces it. (ii) State the consumer level of a person who eats the goat.
- Materiał graficzny
Zadanie 5c
Outline how goat farming can contribute to climate change.
Zadanie 5d
Explain how continued goat farming could arrest succession and keep the site as open vegetation.
Zadanie 6a
A small ribosomal subunit has attached to a eukaryotic mRNA. Describe the remaining initiation steps before elongation begins.
Zadanie 6b
Outline what happens at the A site and the E site during ribosomal elongation.
Zadanie 6c
Explain how tRNA connects an mRNA message to the amino acid sequence being made.
Zadanie 6d
State the cellular structure that degrades unwanted cytosolic polypeptides so their amino acids can be reused.
Zadanie 7
Directional processes depend on structures that constrain movement. (a) Outline how structures in the human circulatory system limit backward blood flow. (b) Explain why transmission across a chemical synapse proceeds from the presynaptic to the postsynaptic…
Zadanie 8
Sexual life cycles can produce new combinations of inherited traits. (a) Draw and label a section of an insect-pollinated flower, indicating the structures associated with male and female gamete production. (b) Explain the sources of variation arising through…
Zadanie 9
Glucose connects molecular structure, energy release and physiological regulation. (a) Distinguish alpha-glucose and beta-glucose in structure and biological role. (b) Explain the regulation that prevents large sustained changes in human blood glucose…