Students investigated the population of Copepods in a rectangular pond.
They collected five sample volumes of 1 dm31\text{ dm}^31 dm3 each from different locations in the pond, filtered out the Copepods, and counted them. The results are shown in Table 1 below:
| Sample number | Number of Copepods in 1 dm31\text{ dm}^31 dm3 of water |
|---|---|
| 1 | 14 |
| 2 | 22 |
| 3 | 3 |
| 4 | 18 |
| 5 | 23 |
Calculate the mean number of Copepods in 1 m31\text{ m}^31 m3 of pond water, given that 1 m3=1000 dm31\text{ m}^3 = 1000\text{ dm}^31 m3=1000 dm3.
The pond has a rectangular volume with the following measurements:
Calculate the estimated total number of Copepods in the entire pond. Give your final answer in standard form.
63 exam-style questions on AQA GCSE Biology 7.1 Adaptations, interdependence and competition, covering 7.1.1 Communities, 7.1.2 Abiotic factors, 7.1.3 Biotic factors, and 7.1.4 Adaptations. Each one has a worked solution and a mark scheme showing where the marks go.