| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.SL.TZ2.15 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 15 | Adapted from | N/A |
Question
A collection of four animal specimens is observed and a dichotomous key is applied. Which specimen is an arthropod?
1. Non-segmented body ..............................go to 2
Segmented body .....................................go to 3
2. Body is not symmetrical...............................specimen A
Body is symmetrical . . . . . . . . . . . . . . . . . . specimen B
3. Jointed appendages present........................specimen C
Jointed appendages absent ........................specimen D
A. Specimen A
B. Specimen B
C. Specimen C
D. Specimen D
Markscheme
C
Examiners report
This question turned out to be surprisingly difficult for candidates but another good discriminator.
