Two bacterial species are tested in four environments. All tests use the same temperature, food supply and starting number of bacteria.
| Environment | Pressure | Salt concentration | Growth of X | Growth of Y |
|---|---|---|---|---|
| W | Low | Low | Yes | Yes |
| X | Very high | Low | No | Yes | |
| Y | Low | Very high | Yes | No | |
| Z | Very high | Very high | No | No |
A student claims that any extremophile able to tolerate one extreme condition will also tolerate a different extreme condition.
Which pair of comparisons provides the clearest evidence against this claim while changing only one factor in each comparison?
Compare W with Z for X, and W with Z for Y.
Compare X with Y for X, and X with Y for Y.
Compare Y with Z for X, and X with Z for Y.
Compare W with Y for X, and W with X for Y.
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.