A student wants to estimate the number of daisy plants on a school field.
The field is a rectangle 50 m long and 40 m wide.
The student uses a quadrat with an area of 0.25 m2.
She places 10 quadrats on the field and counts the daisy plants in each quadrat.
The Table shows her results.
Table
| Quadrat number | Number of daisy plants |
|---|---|
| 1 | 4 |
| 2 | 7 |
| 3 | 0 |
| 4 | 3 |
| 5 | 9 |
| 6 | 5 |
| 7 | 2 |
| 8 | 6 |
| 9 | 0 |
| 10 | 4 |
Calculate the mean number of daisy plants per quadrat.
Describe how the student should place the quadrats randomly on the field.
Estimate the total number of daisy plants on the field.
The student says:
'Daisy plants grow evenly over the whole field.'
Use the Table to explain why the student is wrong.
109 exam-style questions on OCR GCSE Biology 6.1 Monitoring and maintaining the environment, covering 6.1.1 Field investigation of distribution and abundance, 6.1.2 Human interactions and biodiversity, 6.1.3 Maintaining biodiversity, and 6.1.4 Environmental change and distribution of organisms. Each one has a worked solution and a mark scheme showing where the marks go.