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population and community

organism a living thing
habitat an environment that provides the things organism needs to live,grow,and reproduce
biotic factor a living part of an organism's environment
abiotic factor a nonliving part of an organisms habitat
photosynthesis The process in which organism use water along with sunlight and carbon dioxide to make their own food
species a group of organism that are physically similar and mate with each other and produce offspring that can mate and reproduce
population all the members of one species in a population in particular area
community all the populations that live together in an area
ecosystem the community of organism that live together in a particular area along with their nonliving surroundings
ecology the study of how living things interact with each other and their environments
estimate is an approximation of a number , based on reasonable assumption
birth rate of a population is the number of births in a population in a certain amount of time
death rate is the number of deaths in a population in a certain amount of times
immigriation moving in to a population
emigration leaving a population
population density the number of individuals in an specific area of a specific size
limiting factors an environmental factor that causes a population to decrease
carrying capacity the largest population that an area can hold
natural selection a characteristic that makes an individual better suited to is's environment may eventually become common in that species throughout a process
adaptions the behaviors and physical characteristics that allow organisms to live successfully in their environments
niche the goal of an organism in its habitat, or how it makes its living
competition the struggle between origanism to survive as they attempt to use the same limited resources
predation an interaction in one organism kills another for food
predator the organism that dose the killing
prey the organism that is killed
symbiosis a close relationship in which both species benefit
mutualism a relationship in which both species benefit
commensalism a relationship in which one species benifits and the other is neither helped of harmed
parasitism involves one organism living on or inside another organism and harming it
parasite the organism that benefits
host the organism it lives on or in
Created by: janehill