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chapter 1
populations and communities
| Question | Answer |
|---|---|
| organism | a living thing |
| habitat | An environment that provides the things that the organisim needs to live grow and reproduce. |
| biotic factors | the living parts of a habitat |
| abiotic factors | the nonliving parts of an organisms habitat |
| photosynthesis | the process in witch plants and algae make food using water and carbon dioxide |
| species | a group of animals that are closely related |
| ecology | the study of how living things interact with each other and their own environment |
| estimate | an approximation of a number based on reasonable assumption |
| population | all the members of one species in a particular area |
| community | all the populations in an area |
| ecosystem | the community of organisms that live in a particular area along with their nonliving surroundings |
| birth rate | the number of births in a certain amount of time |
| death rate | the number of deaths in a certain amount of time |
| immigration | means moving into a population |
| emigration | means moving out of a population |
| population density | the number of individuals in an area of a specific species |
| natural selection | individuals that have uniqe characteristics are beat suited for their environment tend to survive and produce an offspring |
| adaptions | the behaviors and physical characteristics that allow organisms to live successfully in their environment |
| natural selection | individuals that have uniqe characteristics are best suited for their environment tend to survive and produce offspring. |
| adaptations | the behaviors and physical characteristics that allow organisms to live succsesfully in their environment |
| niche | the role of an organism in its habitat or how it makes its living |
| competition | the struggle between organisims to survive as they attemt to use the same limited resource |
| predation | an interaction in witch one organisim kills another for food |
| predator | the organism that does the killing |
| prey | the organism that is killed |
| symbiosis | a close relationship between two species that benifits at least one of the species |
| mutualisim | a relationship in witch both species benifit |
| commensalisim | a relationship in witch one species benefits and the other in neither helped or harmed |
| parasitisim | involves one organisim living on or inside of another organism |
| parasite | the organism that benifits |
| host | the organisim that the parasite lives on |
Created by:
nkellogg
Popular Science sets