DP Biology (last assessment 2024)
Question 18M.2.SL.TZ1.b
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.2.SL.TZ1.b |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Identify | Question number | b | Adapted from | N/A |
b.
[Maximum mark: 2]
18M.2.SL.TZ1.b
C. nemoralis (pictured below) is a mollusc. Identify two external features that distinguish this snail from an arthropod.
[2]
Markscheme
a. unsegmented body (whereas arthropods are segmented)
b. shell (versus exoskeleton in arthropods)
c. muscular foot (which arthropods do not have)
d. no (jointed) appendages/(jointed) legs (whereas arthropods have jointed legs/appendages)
e. slimy/mucus-covered / arthropod is not slimy
Do not award marks for any answers after the first two given.
