Zadanie 1a
Distinguish the main wall material of a flowering-plant cell from that of a fungal hypha.
Biology SL Paper 1B, May 2026, TZ3
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 25 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Preparing and measuring microscope specimens (2), Biological calculations, statistics and graphs (2), Evaluating biological evidence and methods (2).
Rozwiąż arkuszCały arkusz po kolei. Wynik na końcu.
Dodaj cały arkusz do zestawuZadanie 1b
Outline how to prepare a temporary mount of a thin leek epidermis sample.
Zadanie 1c
The superimposed scales calibrate an eyepiece graticule. A young epidermal cell spans 65 graticule divisions at this magnification. Calculate its actual length in µm.
- Materiał graficzny
Zadanie 2a
One student counts a wrist pulse for 60 seconds; another counts for 20 seconds and multiplies by three. (i) Suggest why the full-minute estimate may be more accurate. (ii) Suggest one advantage of an electronic pulse monitor over manual counting.
Zadanie 2b
Outline possible consequences when a thrombus obstructs a coronary artery.
Zadanie 2c
An invented adult cohort gives the following associations with total blood cholesterol. Deduce conclusions supported by these results.
- Tabela do uzupełnienia
Zadanie 3a
Explain why respiration moves the marker to the left, towards the seed chamber.
- Materiał graficzny
Zadanie 3b
A control contains the same mass of inert plastic beads instead of germinating seeds. Outline its purpose.
- Materiał graficzny
Zadanie 3c
Distinguish human aerobic respiration from human anaerobic respiration.
Zadanie 4a
Identify the DNA-profiling technique used to: (i) make many copies of a DNA region; (ii) separate DNA fragments by size.
Zadanie 4b
The model profiles show one mother, her child and three possible fathers. Deduce the most likely father and give a reason.
- Materiał graficzny
Zadanie 4c
Explain why forensic DNA profiles use multiple independent markers.