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chapter 1

populations and communitities

organism living thing
habitat an enviroment that provides things it needs to live, grow, and reproduce.
Biotic Factors a living part of an organism habitat.
Abiotic factors are the nonliving parts of an organisms habitat
photosynthesis the process in which organisms use water along with sunlight and carbon dioxide, to make their own food in a process called photosynthesis.
species A species is a group of organisms that are physically similar and can mate with each other and produce an offspring that can also mate and produce.
population The 400 million Prarie dogs in the Texas Town are on example of a population.
community To be considered a community, the different populations must live close enough together to interact.
ecosystem The community of organisms that live in a particular area along with their nonliving surroundings.
ecology ecologists are scientists who study ecology.
estimate an approximation of a number, based on reasonable assumptions.
birthrate Of a population is the number of deaths in a population in a certain amount of time.
deathrate is the number of deaths in a certain amounts of time.
immigration means moving into a population.
emigration means leaving a population.
Created by: poloush