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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