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chapter 10

chapter ten environment

organism a living thing
habitat an environment that provides the things the organism needs to live, grow,and reproduce.
biotic factors the living parts of a habitat
abiotic factors the nonliving parts of an organisms habitat.
photosynthesis when plants and algae need water along with sunlight and carbon dioxide to make their own food in a process
species a group of organisms that are physically similar and can mate with eachother and produce offspring that also mate and reproduce
population all the members of one spiecies in a particular area.
community all the different populations that live together in an area
ecosystem the community of organisms that live in a particular area,along with their nonliving surroundings
ecology the study of how living things interact with eachother and with their environment
birth rate the number of births in a population in a certain amount of time.
death rate the number of deaths in a population in a certain amount of time.
immigration moving into a population
emigration leaving a population
limiting factor an environmental factor that causes a population to stop growing.
limiting factors some limiting factors for populations are food and water,space,light soil compositions,and weather conditions.
carrying capacity the largest population that an area can support.
energy roles each of the organisms in an ecosystem fills the energy role of producer,consumer,or decomposer.
producer an organism that can make it own food
consumer an organism that obtains energy by feeding on other organisms.for example herbivores, carnivores,omnivores,and a scavenger
herbivore consumer that eats only plants
carnivore eat only other animals
omnivores eats both plants and animals
scavenger a carnivore that feeds on the bodies of dead organisms
decomposers breaks down wastes and dead organisms and return the raw materials to the ecosystem.
food chain a series of events in which one organism eats another and obtains energy
food web consists of the many overlapping food chains in an ecosystem
energy pyramid shows the amount of energy that moves from one feeding level to another in a food web.
natural selection a charactoristic that makes an indevidual better suited to its environment may eventualy become common in that speices
adaptations the behaviors and physical charactoristics that allow organisms to live sucessfully in their environment
niche the role of an organism in its habitat, or how it makes its living
competition the struggle between organisms to survive as they attempt to use the same limited resource
predation an interaction in which one organism kills another for food
preditor the organism that does the killing
prey the organism that gets killed
symbiosis a close relationship between two speices that benefits at least one of the speices
mutualism a relationship in which both speices benefit
commensalism a relationship in which one speices benefits and the other species is neither helped nor harmed
parasitism involves one organism living on or inside another organism and harming it
parasite the organism that benifits
host the organism it lives on or in
Created by: alikat