Zadanie 1a
(i) Draw one plausible four-level food chain using the organism groups listed. (ii) Suggest one way fish could increase the supply of nutrients in lake water.
- Materiał graficzny
Biology SL Paper 2, May 2024, 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 12 zadań z tego arkusza, razem 52 punkty, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (4), Explaining energy losses between trophic levels (2), Evaluating biological evidence and methods (2).
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Dodaj cały arkusz do zestawuZadanie 1b
Distinguish between the fish communities in the two regions.
- Materiał graficzny
Zadanie 1c
(i) Compare and contrast the mean fish lengths in the regions. (ii) Use both species charts to estimate the mean length of the most densely represented warm-region species.
- Materiał graficzny
Zadanie 1d
(i) Identify the region and vegetation habitat with the greatest omnivore density. (ii) Suggest why planktivores can be more numerous than piscivores. (iii) Suggest why smaller fish are more abundant among submerged vegetation.
- Materiał graficzny
Zadanie 1e
Explain what the transparency plots suggest about the relationship between water clarity and fish species richness.
- Materiał graficzny
Zadanie 1f
Predict one possible effect of climatic warming on the cool-region fish community.
- Materiał graficzny
Zadanie 2
A photosynthetic unicellular alga exchanges substances with the surrounding water. Explain why the cell needs excretion.
Zadanie 3
A bacterial population becomes less susceptible to an antibiotic after many generations of exposure. (i) State two structural features distinguishing a typical bacterial cell from a typical eukaryotic cell. (ii) Explain how resistance can become common in this…
Zadanie 4a
Draw and label a single DNA nucleotide.
Zadanie 4b
In a model experiment, bacteria initially use nitrogen-15, a heavier stable isotope, to make their DNA. They are transferred to a medium supplying only nitrogen-14, the lighter isotope. DNA extracted before transfer and after one and two cell divisions is…
- Materiał graficzny
Zadanie 5
(a) Outline the structure and properties of triglycerides. (b) Explain how energy moves through a photosynthetic ecosystem.
Zadanie 6
(a) Describe how proteins are built from their constituent units. (b) Explain hormonal regulation of human blood glucose concentration. (c) Explain how meiosis contributes to genetic variation.