Plantain plants were sampled in two parts of a meadow, P and Q. Quadrats were placed at random coordinates in each part, and the number of plantain plants in each quadrat was recorded.
| Part of meadow | Number of quadrats | Area of each quadrat in m2\mathrm{m}^2m2 | Plantain counts in the quadrats |
|---|---|---|---|
| P | 4 | 0.50 | 4, 6, 5, 5 |
| Q | 3 | 0.75 | 9, 12, 6 |
How does the population density of plantain plants in Q compare with that in P?
Q is 20% denser than P.
Q is 16.7% denser than P.
P is 20% denser than Q.
Q is 35% denser than P.
82 exam-style questions on Edexcel GCSE Biology 9.1 Ecosystems and interdependence, covering 9.1.1 Levels of organisation in ecosystems, 9.1.2 Abiotic and biotic factors, 9.1.3 Importance of interdependence, 9.1.4 Parasitism and mutualism, and 9.1.5 Determining number of organisms in an area. Each one has a worked solution and a mark scheme showing where the marks go.