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5. producer any green plant or any of various microorganisms that can convert light energy or chemical energy into organic matter.
6. relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism.
7. the division of resources to avoid interspecific competition for limited resources in an ecosystem.
9. association between organisms of two different species in which each benefits.
11. is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar
13. the process of reciprocal evolutionary change that occurs between pairs of species or among groups of species as they interact with one another.
14. the role an organism plays in a community.
16. - a close, prolonged association between two or more different biological species.
17. the ability to 'live with' or 'put up with' something has wide-ranging applications in engineering, and is strongly parallel to the notion of error bars in science.
19. an organism that eats plants and animals.
20. is an organism that survives on a diet of dead and decaying plant and animal matter.

1. An organism, often a bacterium, fungus, or invertebrate that feeds on and breaks down dead plant or animal matter, making organic nutrients available to the ecosystem.
2. an organism that mostly feeds on plants.
3. the ecological process by which energy is transferred from living animal to living animal based on the behavior of a predator that captures and kills a prey before eating it.
4. the process by which cells derive energy from glucose.
8. as the biological production of organic compounds from one-carbon (C-1) compounds and nutrients using the energy generated by the oxidation of inorganic or C-1 organic molecules.
10. 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.
12. a form of consumption in which an organism principally eats autotrophs such as plants, algae and photosynthesizing bacteria.
15. is an organism that cannot produce its own food and must eat other plants and/or animals to get energy.
18. an organism that mostly feeds on meat .