Zadanie 1b
A student prepares stained squash mounts from a young garlic root to examine cell division. (i) Outline why a stain is used. (ii) Describe how to calculate a reliable mitotic index for the tissue.
Tumour behaviour and the mitotic index
Distinguish benign and malignant growth, invasion and metastasis, and calculate the proportion of dividing cells.
Tę umiejętność sprawdza 5 zadań wzorowanych na arkuszach IB z lat 2024–2026.
Zadania sprawdzające tę umiejętność: 5 Otwórz w wyszukiwarce z filtrami
Zadanie 1c
In a model tumour-culture experiment, comparable tissue samples are randomly allocated to four treatments: neither compound, P alone, Q alone, or P with Q. After the same incubation period, mitotic indices are measured. Error bars represent standard…
- Materiał graficzny
Zadanie 4a
A root meristem sample contains 240 cells. Its mitotic index is 0.30. Calculate how many of these cells are undergoing mitosis.
Zadanie 19
Which feature is common to benign and malignant tumours in the standard model of tumour development? A. Both always invade every adjacent tissue B. Both grow as perfectly spherical masses C. Both arise from accumulated changes that disrupt control of cell…
Zadanie 5
Which set of processes can establish and enlarge a new tumour at a site distant from an original malignant tumour? A. Cell spread, nuclear division and division of cytoplasm B. Cell migration followed only by cell enlargement, without producing daughter cells…