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Chapter 1
Populations and Communities
| 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 |
Created by:
isbrennan
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