Two mammals maintain the same body temperature in the same cold environment. They have identical insulation per unit surface area. Heat loss per hour is proportional to exposed surface area.
| Mammal | Exposed surface area / cm2\text{cm}^2cm2 | Body mass / g |
|---|---|---|
| P | 600 | 200 |
| Q | 1200 | 800 |
Which statement correctly compares their heat losses?
Q loses twice as much heat in total and twice as much per gram.
Q loses half as much heat in total and twice as much per gram.
Q loses half as much heat in total and half as much per gram.
Q loses twice as much heat in total and half as much per gram.
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.