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13 Cards in this Set

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ecology
scientific study of interactions between organisms and their enviroments
bioshpere
portion of earths crust that supports life; extends from high in the atmosphere to the bottom of the oceans
abiotic factor
nonliving parts of an organism's environment; air currents, temperature, moisture, light and soil are examples
biotic factor
all the living organisms that inhabit an environment
population
group of organisms all of the same species, which interbreed and live in the same place at the same time
biological community
a community made up of interacting populations at a certain place at a certain time
ecosystem
interactions among population's in a community; the communities physical surroundings, or abiotic factors
habitat
place that an organism lives outside of its life
niche
role or position a species has in its environment; includes all biotic and abiotic interactions as an animals meets its needs for survival and reproduction
symbiosis
permanent, close association between two or more organisms of different species
commensalism
symbiotic relationship in which one species benefits and the other species is not harmed, but also doesn't benefit
mutualism
a symbiotic relationship in which both species benefit
parasitism
symbiotic relationship in which one organism benefits at the expense of another, usually other species