B9 Revision

4. The protection of an area or species to prevent damage
6. Organisms that have always been in an area
7. All the different organisms and the environment in which they live and how they interact
10. Organisms that have been introduced to an area where they were not before
11. factor Living components of an ecosystem
13. The features of an organism that enable it to do a certain job
14. The place an organism lives e.g. wood
15. When organisms rely on each other for food
17. An organism that lives in or on a host and takes food from it while it is alive
18. Where an organism can be found in an area
19. A group of one species living in an area

1. When organisms struggle for the same resources
2. All the different organisms living and interacting with each other in a particular area
3. The variety of different species in an area
5. An area or species that is at great risk of destruction
8. factor Non-living conditions that can affect where animals live
9. Planting new forests where old ones have been cut down
12. How common something is in an area
16. A relationship between two different species where both benefit