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Ecology
| Term | Definition |
|---|---|
| abiotic | nonliving factor such as air, water, sun |
| biotic | living factor in the environment such as plants and animals |
| homeostasis | maintaining a relatively stable environment; balance |
| organism/species | a living thing composed of organ systems that can breed and produce offspring |
| ecosystem | all the living and nonliving things in an area |
| biosphere | Earth |
| nitrogen fixation | BACTERIA changes the nitrogen into a form that living things can use |
| competition | occurs when organisms fight for the same resource and the same time ex. food, water, shelter |
| predation | one organism captures and eats another |
| symbiosis | two different species live close together |
| mutualism | both species benefit from the relationship ex. bees and flowers |
| commensalism | one benefits and the other is not helped nor harmed ex. barnacle and whale |
| parasitism | one benefits and the other is harmed ex. dog and tick |
| autotroph/producer | an organism that makes its own food through photosynthesis ex. plant |
| heterotroph/consumer | an organism that relys on others for food and must eat. ex. animal |
| herbivore | eats only plants |
| omnivore | eats both plants and animals |
| carnivore | eats only meat |
| decomposer | breaks down dead or organic matter ex. bacteria and mushrooms |
| 10% Law | the amount of energy passed onto the next energy level; the rest is lost as heat |