Biology 5090 · 19 Relationships of organisms with one another and with the environment
19.1 Energy flow
Describe energy flow through food chains and webs, explaining trophic levels, transfer inefficiency, and ecological pyramids.
- Questions
- 130
- Years
- 2004–2026
- Multiple choice
- 96
- Written answer
- 34
- Average marks
- 3.3
Practise relationships of organisms with one another and with the environment questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 01, 11, 1296
- Paper 2variants 02, 21, 2234
Questions by year
| Year | May/June | Oct/Nov | Total |
|---|---|---|---|
| 2026 | 2 | – | 2 |
| 2023 | 2 | 4 | 6 |
| 2022 | 1 | 3 | 4 |
| 2021 | 5 | 4 | 9 |
| 2020 | 4 | 6 | 10 |
| 2019 | 5 | 5 | 10 |
| 2018 | 5 | 3 | 8 |
| 2017 | 5 | 6 | 11 |
| 2016 | 3 | 4 | 7 |
| 2015 | 4 | 3 | 7 |
| 2014 | 1 | 4 | 5 |
| 2013 | 4 | 5 | 9 |
| 2012 | 6 | – | 6 |
| 2011 | 4 | 1 | 5 |
| 2010 | – | 1 | 1 |
| 2009 | 1 | 3 | 4 |
| 2008 | 4 | 3 | 7 |
| 2007 | 1 | 3 | 4 |
| 2006 | 2 | 3 | 5 |
| 2005 | 3 | 3 | 6 |
| 2004 | 3 | 1 | 4 |
