| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.SL.TZ1.21 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Describe | Question number | 21 | Adapted from | N/A |
Question
What characteristics describe homologous structures?
A. They have the same ancestral origin but may have different functions.
B. They have the same ancestral origin and always have the same function.
C. They have different ancestral origins and may have different functions.
D. They have different ancestral origins but always have the same function.
Markscheme
A
Examiners report
N/A
