Biology

1. variations of animals of different or same types
3. plants that eat and convert corpses to energy
4. animals home that its native too
6. non-living part of an ecosystem that shapes its environment
7. an association between two organisms in which one benefits and the other derives neither benefit nor harm
9. a comfortable or suitable position in life or employment
11. occurs when new land is formed or bare rock is exposed, providing a habitat that can be colonized for the first time
14. a natural material in habitats
15. the variety of life in the world or in a particular habitat or ecosystem

2. two species cannot coexist in the same ecological niche for very long without one becoming extinct or being driven out because of competition for limited resources
5. the development of new inhabitants to replace the previous community of plants and animals that has been disrupted or disturbed by an event
8. an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide
10. a huge area of land for animals like forests or tundra
12. an organism that derives the organic compounds and energy it needs from the consumption of other organisms; a heterotroph
13. both animals benefit from one another