Zadanie 1a
Identify the most abundant dissolved carbon form within the shaded seawater interval.
- Materiał graficzny
Biology HL Paper 2, May 2026, 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 29 zadań z tego arkusza, razem 96 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (3), Warming and acidification threatening reefs (2), Evaluating biological evidence and methods (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
State the relationship between the fractions of aqueous CO₂ and carbonate ions across the pH range shown.
- Materiał graficzny
Zadanie 1c
Identify one natural process or environmental factor that could change the pH of water in the lagoon.
- Materiał graficzny
Zadanie 1d
Calculate the percentage change in hydrogen carbonate concentration from the reference to the twice-reference projection.
- Materiał graficzny
Zadanie 1e
Suggest why the model includes both twice-reference and six-times-reference atmospheric CO₂ scenarios for 2090.
- Materiał graficzny
Zadanie 1f
Outline an appropriate control treatment for the reef mesocosm experiment.
- Materiał graficzny
Zadanie 1g
Compare and contrast the responses of the crustose calcifying algae and the fleshy non-calcifying algae under the two treatments.
- Materiał graficzny
Zadanie 1h
Using evidence from both graphs and the table, predict how rising atmospheric CO₂ could affect reef communities by 2090.
- Materiał graficzny
Zadanie 2a
Draw a labelled diagram of a single nucleotide that could be incorporated into an RNA transcript.
Zadanie 2b
State the reaction type by which adjacent nucleotides become covalently joined in an RNA chain.
Zadanie 2c
Outline how a cell transcribes a protein-coding DNA sequence into an mRNA molecule.
Zadanie 2d
Describe the processing of a newly transcribed eukaryotic mRNA before its export from the nucleus.
Zadanie 3a
State the name of component K.
- Materiał graficzny
Zadanie 3b
Identify the replication cycle illustrated and give a reason for your choice.
- Materiał graficzny
Zadanie 3c
State the mode of existence shared by viruses.
- Materiał graficzny
Zadanie 3d
Discuss evidence consistent with viruses having arisen on more than one occasion.
- Materiał graficzny
Zadanie 4
Compare and contrast the organelles of a ciliated mammalian airway epithelial cell and a budding yeast cell.
Zadanie 5a
State the missing entries P, Q and R in this summary of human endocrine signalling.
- Tabela do uzupełnienia
Zadanie 5b
After several hours without food, a person’s blood glucose begins to fall. Explain how glucagon contributes to restoring the regulated concentration.
Zadanie 6a
State the process that originally creates a new allele.
Zadanie 6b
State the term for an infectious disease transmitted from another animal species to humans.
Zadanie 6c
Explain why repeated outbreaks could increase the frequency of R.
Zadanie 7a
State the genetic term for an individual carrying two different alleles, one dominant and one recessive, at an autosomal locus.
Zadanie 7b
Distinguish between the effects of a dominant allele and a recessive allele under complete dominance.
Zadanie 7c
Two unaffected parents are both carriers of the recessive allele p causing phenylketonuria. Construct a Punnett grid to show the probability that their child has the condition. Use P for the functional allele.
Zadanie 7d
Explain why a typical XY male cannot be an unaffected heterozygous carrier of the recessive haemophilia allele.
Zadanie 8
During exercise, oxygen delivery must meet increased demand in mammalian tissues. (a) Outline the molecular structure of haemoglobin. (b) Explain how the Bohr effect improves delivery of oxygen to tissues with a high respiration rate. (c) Describe features of…
Zadanie 9
An animal’s survival depends on how its structures and behaviour fit its surroundings. (a) Outline how animal membranes can maintain suitable fluidity in habitats with contrasting temperatures. (b) Describe adaptations that allow herbivores to obtain plant…
Zadanie 10
Membranes support water balance, electrical signalling and energy conversion. (a) Outline what happens to cells in a piece of plant tissue transferred to a hypotonic solution. (b) Describe the establishment and maintenance of a resting membrane potential in a…