symbiosis - a close, long-term relationship between two species that usually involves an exchange of food or energy, mutualism - a symbiotic relationship in which BOTH organisms BENEFIT, parasitism - a symbiotic relationship in which ONE organism benefits and the other is HARMED, commensalism - a symbiotic relationship that BENEFITS ONE species but does not harm or benefit the other, cooperative relationship - a non-symbiotic relationship in which species work together, predator-prey relationship - a non-symbiotic relationship in which one organism eats another, competitive relationship - a non-symbiotic relationship in which organisms share the same habitat and COMPETE for resources (food, shelter, water, etc.), population - all the organisms of the SAME SPECIES that live in the SAME AREA at the SAME TIME, community - all the populations living in an ecosystem at the same time, species - a group of organisms that have similar traits and are able to produce fertile offspring, biosphere - the parts of the Earth and the surrounding atmosphere where there is life, limiting factor - a factor that can limit the growth of a population, carrying capacity - the largest number of individuals of one species that an ecosystem can support over time, overpopulation - condition that occurs when a population becomes so large that it causes damage to the environment, biotic potential - the POTENTIAL GROWTH of a population IF it could grow in perfect conditions with no limiting factors,

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