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20 Cards in this Set

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species

a group of organisms that can interbreed and produce fertile offspring in nature

ecology

the study of interactions that take place between organisms and their environment

biosphere

the portiob of Earth's that supports life

abiotic factors

nonliving parts of an organism's environment

biotic factors

all the living things organisms that inhabit an environment

population

a group of species, all if the same species, that interbreed and live in the same area at the same time

human population

biological community

made up of interacting populations in a certain area at a certain time

ecosystem

made up of interacting populations in a biological community and the community's abiotic factors

habitat

the place where an organism lives out its life

niche

ALL the strategies and adaptaions a species uses in its environment

includes ALL THE INTERACTIONS witb the ABIOTIC AND BIOTIC FACTORS of its habitat

symbiosis

the relationship in which there is a close and permanent association between organisms of different species

commensalism

a symbiotic relationship in which ONE species BENEFITS and the other is NEITHER HARMED NOR BENEFITED

win-neautral

mutualism

symbiotic relationship in which BOTH species BENFIT

win-win

parasitism

symbiotic relationships i which ONE member BENFITS at the EXPENSE OF THE OTHER MEMBER

win-lose

autotroph

an organism that produces its own food using light chemicals or ebergy stored in chemical compounds

AKA a producer

heterotroph

an organism that CANNOT make its own food and feeds on other organisms for energy

decomposer

break down the complex compounds of dead/decaying organisms into simpler molecules so that they can be easier to absorb

food chain

a simple model that scientists use to show matter and energy move through an ecosystem

food web

model that shows ALL possible feeding relationships at each trophic level in a community

biomass

the TOTAL weight of living matter at each trophic level