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Chapter.1
Population and communities
| Question | Answer |
|---|---|
| organism | a living thing |
| habitat | an environment that provides the things the organism needs to live,grow and reproduce |
| biotic factors | a living part in an organism's habitat |
| abiotic factors | a nonliving thing part of an organism's habitat |
| photosynthesis | the process in which organisms use water, along with sunlight and carbon dioxide to make their own food |
| species | a group that are physically similar and can mate with each other and produce offspring that can also mate and reproduce |
| population | all the members of one species in a particular area |
| community | all the different populations that live together in an area |
| Ecosystem | The community of organisms that live in a particular area along with their nonliving surrounding. |
| Ecology | The study of how living things interact with e ach other and their environment |
| estimate | An appoximation of a number based on reasonable assumptions |
| birth rate | the number of births in a population in a certain amount of time in a certain area |
| death rate | the number of deaths in a population in a certain amount of time ina cerain area |
| immigration | moving into a population |
| emmigration | leaving a population |
| population density | the number of individuals in an area of specific size |
| limiting factor | an environmental factor that causes a population to decrease |
| carring capacity | the largest population that an area can support |
| natural selection | A process by which characteristics that make an individual better suited to its environment become common in a species |
| adaption | the behavior and physical characteristics the allow organisms to live sucessfuly in their envirenment |
| niche | the role of an organism in its habitat or how it makes its living |
| compitition | the struggle between organisms to survive as they attempt to use the same limited sorce |
| predation | an interaction which on organism kills another organism for food |
| predator | the organism that does the killing in a predition interaction |
| prey | an organism that is killed and eaten by anther organism |
| symbosis | a close relationship between two species that benefits at least one of the species |
| mutualism | The relationship between two species in which both species benefit. |
| commensalism | A relationship between two species in which one species benefits and the other is neither helped or harmed |
| parasitism | A relationship in which one organism lives on or in a host and harms it. |
| parasite | The organism that benefits by living on or in a host in a parasitism interaction |
| host | The organism that a parasite lives in or on in a parasitism interaction |
Created by:
rnagel
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