Doctors use percentile charts to monitor the growth of children.
The height of a child is on the 25th percentile.
State what this means.
The Table shows the height of a girl and the 50th percentile height for girls at different ages.
Table
| Age in years | Height of girl in cm\text{cm}cm | 50th percentile height in cm\text{cm}cm |
|---|---|---|
| 2 | 86 | 86 |
| 4 | 100 | 102 |
| 6 | 112 | 115 |
| 8 | 124 | 128 |
Describe how the growth of the girl compares with the 50th percentile.
Calculate the mean rate of growth of the girl between the ages of 2 years and 8 years.
Give your answer in cm\text{cm}cm per year.
Give one reason why a child's height is measured several times rather than only once.
42 exam-style questions on Edexcel GCSE Biology 2.1 Cell division and growth, covering 2.1.1 Mitosis and the cell cycle, 2.1.2 Division producing identical daughter cells, 2.1.3 Cancer and uncontrolled cell division, 2.1.4 Growth in animals and plants, 2.1.5 Importance of cell differentiation, and 2.1.6 Percentile charts to monitor growth. Each one has a worked solution and a mark scheme showing where the marks go.