Term | Definition |
organism | a living thing |
habitat | an environment that provides everything a specific species need to live, grow and reproduce |
biotic factor | the parts that were alive at one time in a habitat |
abiotic factor | the nonliving parts of a habitat |
species | a group of organisms that can mat and reproduce and their offsrping can as well |
population | all of the members of one species in an area |
community | all the different populations in an area |
ecology | the study of how organisms react with their environment |
ecosystem | all the living and non living things in an area |
birth rate | the number of births per 1000 individuals of a certain time period |
death rate | the number of deaths per 1000 individuals of a certain time period |
immigration | when an organism moves into a population |
emigration | when an organism moves out of a population |
population density | the number of animals in an area of a specific size |
limiting factors | an environmental factor that cause a population to stop growing |
carrying capacity | the largest population an area can support |
natural selection | a characteristic that makes a species better in a specific environment that is passed down through generations |
adaption | the behaviors and physical characteristics that allow organisms to successfully survive in their habitat |
niche | the role of an organism in its habitat |
competition | the struggle of species to survive with the same needs |
predation | when one organism kills another for food or nutrients |
predator | the organism doing the killing |
prey | the organism being killed |
symbiosis | any relationship between to organisms |
mutualism | both species benifit |
commensalism | one is not harmed and one benifits |
parasitsm | one species benefits and the other is harmed |
parasite | the organism that benefits from parsitism |
host | the organism that the parasite lives in or on |
succesion | the series of predictable changes in a community over time |
primary succession | succession without soil |
secondary succession | succession with soil existing |
pioneer species | the fist species to populate an area |