Zadanie 1a
State the lowest observed survival percentage among the aspen clones, naming the clone.
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Biology HL Paper 2, November 2024
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 25 zadań z tego arkusza, razem 82 punkty, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (5), Evaluating biological evidence and methods (3), Assembling glycerol-based lipids (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Analyse the survival results for the different tree groups at the contaminated site.
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Zadanie 1c
State the relationship between added fuel and relative transpiration in clone A.
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Zadanie 1d
Compare and contrast the fuel responses of clone A and willow.
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Zadanie 1e
Suggest how drainage that increases soil oxygen could improve remediation.
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Zadanie 1f
Calculate the percentage change in the aromatic fraction from February 2012 to July 2018.
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Zadanie 1g
Determine which measure falls faster between the first two soil surveys, supporting your answer with the chart.
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Zadanie 1h
Outline why the non-immersed control was included.
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Zadanie 1i
Explain why the immersed leafy cuttings differ from the leafless control.
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Zadanie 1j
Evaluate the use of trees for contaminant removal using the combined evidence.
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Zadanie 2a
A pancreatic secretory cell produces digestive enzymes. State the site where these enzyme proteins are synthesized.
Zadanie 2b
A pancreatic secretory cell packages enzymes into vesicles. Identify the process releasing their contents outside the cell.
Zadanie 2c
Give one pancreatic secretion other than a digestive enzyme and identify the cell type producing it.
Zadanie 3a
A child has three copies of chromosome 13. A schematic chromosome complement is shown; lengths indicate approximate relative chromosome sizes. (i) Describe how this trisomy could arise during gamete production. (ii) Suggest why an extra copy of one of the…
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Zadanie 3b
In a hypothetical beetle, two independently assorting genes determine elytral pigments. A dash means either allele can occupy the position. Genotype | Colour P_Q_ | violet P_qq | red ppQ_ | blue ppqq | ivory A violet PpQq beetle is crossed with a red Ppqq…
Zadanie 4a
The condensed formula represents a triglyceride containing three different fatty-acid residues. Name the two kinds of reactant molecule required to build this triglyceride.
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Zadanie 4b
The condensed formula represents a triglyceride containing three different fatty-acid residues. Add an arrow to one bond created by condensation during its formation.
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Zadanie 4c
The condensed formula represents a triglyceride containing three different fatty-acid residues. Fatty-acid breakdown supplies acetyl coenzyme A. Name the respiratory stage that uses its acetyl group.
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Zadanie 4d
The condensed formula represents a triglyceride containing three different fatty-acid residues. Explain why oxidation of a gram of triglyceride can yield more energy than oxidation of a gram of glucose.
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Zadanie 4e
The condensed formula represents a triglyceride containing three different fatty-acid residues. Suggest health risks associated with a diet high in the type of fat represented.
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Zadanie 5a
A simplified Calvin-cycle pathway is shown. Identify X and Y.
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Zadanie 5b
Carbon fixed in a leaf can be exported towards growing roots. (i) Name the principal sugar transported in phloem. (ii) Explain its transport from leaves to roots.
Zadanie 6
(a) Distinguish competitive inhibition from non-competitive inhibition. (b) Explain why atmospheric carbon dioxide can increase and how this threatens ocean ecosystems.
Zadanie 7
(a) Outline translation of an mRNA molecule in the cytoplasm. (b) Describe how homologous proteins can provide evidence about evolutionary relationships. (c) Explain how proteins bring about skeletal muscle contraction.
Zadanie 8
(a) Describe how auxin produces a shoot’s directional growth response to light. (b) Outline feedback interactions among hormones controlling ovarian and uterine cycles. (c) Explain how the loop of Henle and ADH influence urine concentration.