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Ecology Questions and Answers Already Passed biotic non-living factors in the environment biotic living factors in the environment organism any plant or animal ecology the study of the intera... ction between organisms and the environment biosphere The ecosystems of planet earth individual one organism, a single living thing biome An area with similar climate and ecosystems population a group of interbreeding organisms living in the same area (all of the deer in the forest) ecosystem all the organisms living in the same area AND their nonliving environment community all the organisms of all types living in the same area producer An organism that gets its energy from the sun consumer An organisms that gets its energy from eating other organisms 00:0901:24 decomposer An organism that gets its energy from breaking down dead organisms carnivore A type of consumer that eats only other animals herbivore A type of consumer that eats only plants omnivore A type of consumer that eats both plants and animals predator-prey When one organism feeds on another organism parasitism A symbiotic relationship in which the health of one organism benefits and the health of the other is harmed competition the struggle between organisms to survive in a habitat with limited resources carrying capacity The largest population that an area can support limiting factor An environmental factor that prevents a population from increasing Energy Flow through Food Webs Only about 10% of usable energy is transferred from one trophic level to the next. Reason: usable energy lost as heat food web network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem Matter Anything that has mass and takes up space Species A group of similar organisms that can breed and produce fertile offspring. resource any necessity of life, such as water, nutrients, light, food, or space symbiotic relationship The relationship between two species that live in close association with each other Mutualism A relationship between two species in which both species benefit Commensalism A relationship between two organisms in which one organism benefits and the other is unaffected Parasitism A relationship between two organisms of different species where one benefits and the other is harmed [Show More]

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