A-LevelBiologyBiodiversity and conservation9700/42 · May/June 2019 · Q76 Marks
Define the term ecosystem.
- (a)Define the term ecosystem.[3]
- (b)State the term used to describe: the functional role of a species within an ecosystem a reproductively isolated group of organisms that interbreed to produce fertile offspring physical factors in the environment such as temperature and soil pH.[3]
Mark scheme
Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.
- [3] any three from:
- 1 functional / self-contained / specific, entity / unit / area;
- 2 community (of organisms) / all living organisms of all species / all populations of organisms;
- 3 ref. to interactions ;
- 4 abiotic / physical, and, biotic / biological, factors; A living and non-living
- 5 idea that linked by, energy flow / mineral cycling / food webs / food chains / nutrient cycle;
- [3] niche;
- species;
- abiotic;
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