| Date | May 2016 | Marks available | 1 | Reference code | 16M.1.HL.TZ0.26 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Identify | Question number | 26 | Adapted from | N/A |
Question
How can molluscs and platyhelminthes be distinguished?
A. Molluscs are unsegmented but platyhelminthes are segmented.
B. Molluscs have a mouth and an anus but platyhelminthes do not.
C. Molluscs are smooth but platyhelminthes have bristles.
D. Molluscs remain attached to rock but platyhelminthes move around in water.
Markscheme
B
Examiners report
Some platyhelminthes do not have a mouth and none have an anus, therefore the correct answer is B.
Syllabus sections
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