| Date | May 2016 | Marks available | 1 | Reference code | 16M.1.SL.TZ0.18 |
| Level | Standard level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Deduce | Question number | 18 | Adapted from | N/A |
Question
What limits the length of food chains in an ecosystem?
A. The size of individual organisms
B. Competition between organisms
C. The loss of energy between trophic levels
D. Natural selection
Markscheme
C
Examiners report
This question was a very good discriminator.
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