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Chpt. 3: Ecosystems

Ecosystems

TermDefinition
ecosystem all the living and nonliving things in an area and their interactions
habitat a place that provides all the things an organism needs to live
population a group of organisms of one species that live in an area at the same time
community the group of all populations in an area
predator a consumer that hunts and eats another animal
prey any animal that is hunted by others for food
producer organism that makes its own food for energy
consumer organism that cannot make its own food
decomposer organism that gets its energy by breaking down wastes and dead organisms
food chain a series of steps by which energy moves from one type of living thing to another
food web a diagram that combines many food chains into one picture
photosynthesis the process in which producers use carbon dioxide, water, and sunlight to produce oxygen and sugar.
symbiosis a relationship between two organisms of a different species that benefits at least one of the organisms
parasitism a relationship in which one of the organisms lives on or in a host and harms it
commensalism a relationship between two species in which one benefits and the other is neither helped nor harmed
mutualism a relationship in which both species benefit
environment All of the conditions surrounding an organism.
conservation An attempt to preserve or protect an environment from harmful changes.
pollution Any substance that damages the environment.
competition The struggle among organisms for the same limited resources.
Created by: jprevost5
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