| Date | May 2017 | Marks available | 1 | Reference code | 17M.1.HL.TZ2.20 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 20 | Adapted from | N/A |
Question
The graph shows variations in beak size for the bird Geospiza fortis on an island in the Galápagos archipelago.
What evidence from the graph indicates that disruptive selection is occurring?
A. An intermediate beak size is less common.
B. Median beak size is the most common.
C. Smaller beaks are favoured.
D. Larger beaks are favoured.
Markscheme
A
Examiners report
[N/A]
