The diagram shows a food web. 1. There has been carrot fly this year. How does this affect the population of: a) Rabbits .................................................................................................... .................................................................................................... b) Grass .................................................................................................... .................................................................................................... c) Grasshoppers .................................................................................................... .................................................................................................... d) Birds .................................................................................................... .................................................................................................... The reduction in population of which species would cause the most devastating effects? ............................................................................................................ ............................................................................................................ National 5 Unit 3 Key terms: find definitions for: Abiotic factors: ....................................................... ....................................................... ....................................................... Biotic factors: ....................................................... ....................................................... ....................................................... Community: ....................................................... ....................................................... ....................................................... Ecosystem: ....................................................... ....................................................... ....................................................... Habitat: ....................................................... ....................................................... ....................................................... Population: ....................................................... ....................................................... ....................................................... Biodiversity: ....................................................... ....................................................... ....................................................... Plant competition factors: 1. 2. 3. 4. Animal competition factors: 1. 2. 3. 4.