Two reforestation projects establish the same number of trees on equal areas. Project X uses several native tree species. Project Y uses one non-indigenous tree species. Tree survival is similar.
Which additional evidence would best support the claim that X benefits native biodiversity more than Y?
X has a greater total mass of harvested timber than Y.
X has a greater mean tree height at maturity than Y.
X has a greater total mass of stored water than Y.
X supports a greater variety of native animal species than Y.
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.