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Chapter1
Populations 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 | the living parts of a habitat |
| Abiotic factors | are the nonliving parts 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 of organisms 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 surroundings. |
| 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 in a certain amount of time. |
| Death rate | The number of deaths in a population in a certain amount of time. |
| Immigration | Moving into a population. |
| Emigration | Leaving a population. |
| Population density | The number of individuals in a specific area. |
| Limiting factors | An environmental factor that causes a population to decrease. |
| Carrying capacity | The largest population that an area can support. |
| Nature selecton | A process by which characteristics that make an individual better suited to its environment become more common in a species. |
| Adaptations | A behavior or physical characteristic that allows an organism to live successfully in its environment. |
| Niche | The role of an organism in its habitat, or how it makes its living. |
| Computition | The struggle between organisms to survive as they attempt to use the same limited resource. |
| Predation | An interaction in which one organism kills another for food. |
| Predator | The organism that does the killing in a predation interaction. |
| Prey | An organism that is killed and eaten by another organism. |
| Sumiusis | A close relationship between two species that benefits at least one of the species. |
| Mutualism | A relationship between two species in which both species benefit. |
| Commenalism | A relationship between two species in which one species benefits and the other is neither helped nor 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. |
| Succesion | The series of predictable changes that occur in a community over time. |
| Primary succesion | The series of changes that occur 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 where soil and organisms still exist. |
Created by:
jsat2
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