Zadanie 1a
(i) State the cumulative increase in control-colony mass at week 7. (ii) Compare and contrast colony-mass gains after transfer outdoors. (iii) Suggest a reason for the mass changes between weeks 6 and 8.
- Materiał graficzny
Biology SL Paper 2, May 2022, 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 11 zadań z tego arkusza, razem 48 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Evaluating biological evidence and methods (3), Recording and interpreting biological data (3), Self-renewal and differentiation of stem cells (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Using the queen-production data, predict the effect of pesticide A on bumblebee populations.
- Materiał graficzny
Zadanie 1c
(i) Identify the species with the largest egg-length decrease at the high dose of pesticide B. (ii) Describe the low- and high-dose effects across the four species.
- Materiał graficzny
Zadanie 1d
Deduce whether the tested agriculture-range exposures directly harm B. hypnorum, using the evidence.
- Materiał graficzny
Zadanie 2a
State one defining property of stem cells.
Zadanie 2b
State one therapeutic role of stem cells.
Zadanie 2c
Discuss how replacing affected somatic tissue with functioning stem-cell descendants could affect a person with an inherited disorder and that person’s future children.
Zadanie 4a
Melatonin participates in daily sleep–wake regulation. (i) State the organ that produces melatonin. (ii) A traveller crosses several time zones. Deduce, with a reason, the local time of day when restoring a rise in melatonin would support the usual sleep–wake…
Zadanie 5a
An enzyme is assayed at constant pH and substrate concentration. Explain why activity is lower on either side of the optimum temperature.
- Materiał graficzny
Zadanie 6
Haemophilia can result from inadequate activity of a blood-clotting protein. (a) Outline how translation produces a polypeptide in a cell. (b) A woman carrying the usual X-linked recessive haemophilia allele has children with a man without that allele.…
Zadanie 7
Water availability can influence which plants survive in a community. (a) Outline energy flow through a natural community. (b) Explain how natural selection can increase drought resistance in a wild plant population.