A fish farm replaces some fish caught from wild populations. Waste food from the farm also enters the surrounding water.
Which row identifies one possible benefit and one possible harm?
Table
| Option | Benefit | Harm |
|---|---|---|
| A | reduced harvesting of wild fish | increased oxygen demand from decomposition |
| B | reduced harvesting of wild fish | decreased oxygen demand from decomposition |
| C | increased harvesting of wild fish | increased oxygen demand from decomposition |
| D | increased harvesting of wild fish | decreased oxygen demand from decomposition |
Which row is correct?
row A
row B
row C
row D
38 exam-style questions on Edexcel GCSE Biology 9.2 Energy transfer and biodiversity, covering 9.2.1 Energy transfer between trophic levels, 9.2.2 Efficiency of energy transfers, 9.2.3 Human interactions and biodiversity, 9.2.4 Benefits of maintaining biodiversity, and 9.2.5 Biological factors affecting food security. Each one has a worked solution and a mark scheme showing where the marks go.