Biology Puzzle

3. an organism deriving its nutritional requirements from complex organic substances
4. a number of all the organisms of the same group or species who live in a particular geographical area
6. interaction between two different organisms living in close physical association, typically to the advantage of both.
7. relationship between two species of plants or animals in which one benefits at the expense of the other
9. a biological community of interacting organisms and their physical environment.
11. the natural home or environment of an animal, plant, or other organism.
14. living creatures that eat organisms from a different population
15. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
16. a group of organisms that can reproduce with one another in nature and produce fertile offspring
18. an interacting group of various species in a common location
20. a large naturally occurring community of flora and fauna occupying a major habitat, e.g. forest or tundra.

1. an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
2. heterotrophs that obtain nutrients by consuming detritus
5. organisms capable of creating simple carbohydrates
7. the preying of one animal on others.
8. association between organisms of two different species in which each benefits
10. describes the role an organism plays in a community. A species
12. physical rather than biological; not derived from living organisms.
13. 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.
17. relating to or resulting from living things, especially in their ecological relations.
18. the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
19. an individual animal, plant, or single-celled life form.