Zadanie 1a
Describe the features of enterotype Y shown in the composition chart.
- Materiał graficzny
Biology SL Paper 2, May 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 20 zadań z tego arkusza, razem 61 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (5), Evaluating biological evidence and methods (4), Somatic versus germline mutations (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Estimate the median bacterial count per gram of faeces for W.
- Materiał graficzny
Zadanie 1c
Distinguish between bacterial counts in W and Y.
- Materiał graficzny
Zadanie 1d
Comment on the count data available for Z.
- Materiał graficzny
Zadanie 1e
(i) Estimate the prevalence of Z at BMI 48. (ii) State the association between BMI and Y prevalence.
- Materiał graficzny
Zadanie 1f
Evaluate the evidence in the stacked graph for the hypothesis that W causes low BMI.
- Materiał graficzny
Zadanie 1g
In this model population, inflammatory disease becomes more prevalent with increasing BMI, and Y is associated with more disease at each BMI. Discuss whether treatment L could reduce inflammatory disease, using the pie-chart evidence.
- Materiał graficzny
Zadanie 2a
State the chromosome number expected in a male or female gamete.
Zadanie 2b
Use a Punnett grid to explain the second-generation flower-colour results.
Zadanie 2c
Suggest why the observed numbers do not exactly match the predicted ratio.
Zadanie 3a
State one factor that can cause lung cancer.
Zadanie 3b
Suggest one difference between the tumour and healthy lung tissue that could be observed in their micrographs.
Zadanie 3c
Predict, with a reason, what could be seen if the tumour were growing rapidly instead of slowly.
Zadanie 4a
(i) State, with a reason, whether this animal is autotrophic or heterotrophic. (ii) Explain what information is needed to determine its trophic level.
Zadanie 4b
Outline how mammalian limbs provide evidence for evolution.
Zadanie 5a
Explain how the difference in molecular polarity contributes to the thermal-property differences.
Zadanie 5b
Use the supplied data to deduce why ethane is a gas at ordinary temperatures in human-inhabited environments.
Zadanie 5c
Using the data, explain why ethane would be less suitable than water for evaporative cooling at the skin.
Zadanie 6
(a) Explain how temperature influences enzyme activity. (b) Outline how the thyroid gland contributes to regulation of human body temperature. (c) Describe how human activities contribute to a rise in mean surface air temperature.
Zadanie 7
(a) Describe organelles and other structures of animal cells as they can appear in electron micrographs. (b) Explain how animal cells supply their ATP requirements.