Ecology

1. a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.
4. the relationship between different species in which one organism lives on or in the other organism and benefits from it by causing some harm
7. Threatened Species are any species which are vulnerable to endangerment in the near future.
10. describes the role an organism plays in a community
13. species' average population size in a particular habitat
15. an organism that can produce its own food using light, water, carbon dioxide, or other chemicals.
16. a factor is a non-living part of an ecosystem that shapes its environment.
18. a living organism that shapes its environment

2. as an interaction between individuals of different species that results in positive effects on both species
3. there are 6 different types
5. an animal that hunts, kills and eats other animals for food
6. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings
8. a place where an organism makes its home.
9. a species of animal or plant that is seriously at risk of extinction.
11. an organism that cannot produce its own food, instead taking nutrition from other sources
12. he sequence of transfers of matter and energy in the form of food from organism to organism
14. a term used to describe organisms that predators kill for food.
17. a system of interlocking and interdependent food chains.