Scientists compare limb proportions in two fossils and a modern human.
Table
| Skeleton | Arm length / cm | Leg length / cm |
|---|---|---|
| P | 60 | 72 |
| Q | 45 | 63 |
| modern human | 60 | 90 |
Which comparison of leg length to arm length is correct?
P has the ratio closer to the modern human, despite having a ratio greater than 1.5
Q has the ratio closer to the modern human, because its ratio is greater than 1.5
Q has the ratio closer to the modern human, despite having shorter legs than P
P has the ratio closer to the modern human, because it has longer legs than Q
45 exam-style questions on Edexcel GCSE Biology 4.2 Evidence for evolution and classification, covering 4.2.1 Fossil evidence for human evolution, 4.2.2 Stone tool evidence for human evolution, 4.2.3 Pentadactyl limb as evidence, and 4.2.4 Three domains classification. Each one has a worked solution and a mark scheme showing where the marks go.