Igcse Model Questions Vol1 2024 Biology Question 2

A student studies mitosis in the root tip of an onion (Allium cepa) using the squash technique. The root tip is stained with 1% aceto‑orcein and examined under 1000× magnification. The student records the number of cells in each stage of mitosis and the number of interphase cells in five separate fields of view, as shown in the table. | Field | Prophase | Metaphase | Anaphase | Telophase | Interphase | |-------|----------|-----------|----------|-----------|------------| | 1 | 8 | 6 | 4 | 2 | 30 | | 2 | 7 | 5 | 3 | 1 | 32 | | 3 | 9 | 7 | 5 | 3 | 28 | | 4 | 6 | 4 | 2 | 1 | 35 | | 5 | 8 | 6 | 4 | 2 | 31 | Using this data, answer the following questions.