Question | Answer |
organism | a living thing |
habitat | an enviroment that provides the things for an organism to live |
biotic factor | a living part of an organisms habitat |
photosynthesis | the process in which an organism uses water along with sunlight and carbon dioxide |
abiotic factors | nonliving part of an organisms habitat |
species | a group of organisms that are physically similar and can mate |
population | all the members of one species in a particular area |
community | all the different populations that live together |
ecosystem | the community of organisms that live in an area |
ecology | the study of how living things interact with each other and their environment |
estimate | an approximation of a number based on reasonable assumptions |
birth rate | the number of births in a population |
death rate | the number of deaths in a population |
immigration | moving into a population |
emigration | leaving a population |
population density | the number of individuals in an area of specific size |
natural selection | individuals whose unique characteristics are best suited for their environment tend to survive and produce offspring |
adaptions | the behaviors and physical characteristics that allow organisms to live successfully in their environment |
niche | the type of food the organism eats , how it obtains this food, sandwich other organism as food |
competition | the struggle between organisms to survive as they attempt to use the same limited resource |
predator | the organism that does the killing |
predation | an interaction in which one organism kills another |
prey | the organism that is killed |
symboisis | a close relationship between two species that benifits at least one of the species |
mutalism | a relationship in which both species benifit |
commensalism | a relationship in wich one species benifits and the other species is neither harmed nor helped |
parasitism | one organism living on or inside another organism and harming it |
parasite | the organism that benifits |
host | the organism that it lives on or is in |
succesion | the series of predictable changes that occur in a community over time |
primary succesion | the series of changes that occur in in an area where no soil or organisms exist |
pioneer species | the first species to populate an area |
secondary succesion | the series of changes that occur in an area where the ecosystem has been disturbed but soil and organisms still exist |