The table below shows some of the levels of organisation within organisms.
Complete the table by inserting a tick (✓\checkmark✓) to show the level of organisation of each example. The first one has been done for you.
| Example | Organelle | Cell | Organ |
|---|---|---|---|
| nucleus | ✓\checkmark✓ | ||
| root hair cell | |||
| chloroplast | |||
| kidney | |||
| leaf |
Place the following structures in order of size from the smallest to the largest:
kidneymitochondrionliverred blood cellpituitary gland \text{kidney} \qquad \text{mitochondrion} \qquad \text{liver} \qquad \text{red blood cell} \qquad \text{pituitary gland} kidneymitochondrionliverred blood cellpituitary gland| Order | Structure |
|---|---|
| smallest | 1. ____________________ |
| 2. ____________________ | |
| 3. ____________________ | |
| 4. ____________________ | |
| largest | 5. ____________________ |
3 exam-style questions on Edexcel IGCSE Biology Level of organisation. Each one has a worked solution and a mark scheme showing where the marks go.