| Date | May 2018 | Marks available | 1 | Reference code | 18M.1.SL.TZ1.17 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 17 | Adapted from | N/A |
Question
Animals in the highest trophic level of a food chain will often be the largest in body size but will be few in numbers. What accounts for the small numbers?
A. Food eaten by animals at the highest trophic level has a lower energy content per gram
B. Energy losses through the food chain
C. Conversion of heat energy into chemical energy
D. Biomass of producers is small
Markscheme
B
Examiners report
[N/A]
