Zadanie 1a
A sample of plant epidermal cells is placed in a hypertonic salt solution. Explain the effect on the cells.
Biology SL Paper 3, November 2023, 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 24 zadania z tego arkusza, razem 48 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (12), Evaluating biological evidence and methods (5), Conditions affecting enzyme reaction rates (3).
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Dodaj cały arkusz do zestawuZadanie 1b
An image of a plant cell has a stated magnification of180×. Its length on the image is27mm. Calculate the actual cell length in micrometres.
Zadanie 2a
Compare and contrast the effects of pH on the two preparations.
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Zadanie 2b
State one variable to keep constant.
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Zadanie 3a
State the lane number for the control lacking template DNA.
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Zadanie 3b
Explain why the temperature changes within each cycle.
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Zadanie 3c
Predict the result if fewer cycles are completed.
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Zadanie 4a
A constructed developmental survey measures cortical neurons in a small mammal at eight ages. Error bars show SD. Describe the changes between days3and30.
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Zadanie 4b
A comparison shows that the cerebral cortex in a human brain is highly folded, whereas in a small mammal it is relatively smooth. Explain the advantage of the greater folding.
Zadanie 9
A constructed survey follows weeds resistant to herbicide H after resistant crops become widely used. The chart gives cumulative confirmed species counts. (i) Identify the year with the greatest number of newly recorded resistant species across all regions.…
- Materiał graficzny
Zadanie 10
A model culture tests four antibacterial preparations on a bacterial lawn. X is a control disc. The plate is incubated at25°C for36hours before the schematic result is recorded. (i) Analyse the effects of the four preparations. (ii) Outline one reason for…
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Zadanie 13a
(i) State one process that removes nutrients from the soil store. (ii) Rock weathering releases nutrients into soil. Add X to the arrow representing this input.
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Zadanie 13b
Explain the large nutrient transfer from litter to soil.
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Zadanie 14a
Discuss how the results might affect escape from predators in nature.
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Zadanie 14b
Outline two ways larger plastic debris can reduce marine organisms’ survival.
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Zadanie 15a
After surrounding land is cleared, three forest patches remain with the same total area. Predict which patch might retain the most bird species native to the forest, giving a reason.
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Zadanie 15b
Protected habitats may be separated by roads or cleared land. Outline how wildlife corridors between nearby reserves can help preserve biodiversity.
Zadanie 16a
Identify the whelk’s largest source of dietary energy.
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Zadanie 16b
State the trophic level occupied by limpets.
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Zadanie 16c
Explain the effects of the sea star as a keystone species in this community.
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Zadanie 17
Conservation programmes can use several complementary approaches. Explain how ex situ conservation can help preserve endangered species.
Zadanie 18
Enzyme G catalyses production of vitamin C in some animals. A disabling change in its gene can prevent synthesis. The table gives hypothetical daily production rates for seven animal species. Identify one species for which vitamin C is not an essential dietary…
- Tabela do uzupełnienia
Zadanie 19
Liver cells (hepatocytes) exchange substances with blood in adjacent sinusoids. Some substances are detoxified inside the cells before the resulting products are transported elsewhere. Draw arrows showing (i) the movement of oxygen to a hepatocyte, and (ii)…
- Materiał graficzny
Zadanie 22
Diet can affect health in several ways. Discuss malnutrition and its possible consequences for health.