Across
- 3. The spread of different organisms in a particular area
- 6. Affects which plants can grow in the soil
- 7. These animals can survive in low oxygen levels
- 9. The parasite found in the thorns of the swollen thorn Acacia tree
- 11. A non-living factor that can affect the distribution of plant and animal species
- 14. May move into a new area and start to wipe out existing species of animals
Down
- 1. A gas in the air that stops Lichen growing
- 2. This creature must have a ‘host’ animal to live on to survive
- 4. A non-living factor that could have a big affect on which species can survive
- 5. Something that can tell you if the environment has become polluted
- 8. The distribution of animals in water is determined by this gas
- 10. A type of living factor that can wipe out a species of animal or plant
- 12. An indicator that grows on rock or bark
- 13. The more species of Lichen that grow in one area; the ______ air pollution there is