Students sample two lawns using randomly placed quadrats.
Table
| Lawn | Number of quadrats | Area of each quadrat in m2\mathrm{m}^2m2 | Total daisies counted |
|---|---|---|---|
| P | 10 | 0.25 | 50 |
| Q | 8 | 0.50 | 60 |
Which comparison of mean daisy density is correct?
Q is twice as dense as P.
P is one-third denser than Q.
Q is one-third denser than P.
P is twice as dense as Q.
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.