Question | Answer |
Organism | A living thing |
Habitat | An environment that provides the things an organism needs to live, grow, and reproduce |
Biotic factors | The living parts of a habitat |
Abiotic factors | The nonliving parts of an organisms habitat |
Photosynthesis | Plants and algae need 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 an area of a specific size. |
Limiting Factor | An environmental factor that causes a population to decrease. |
Carrying Capacity | The largest population that an area can support. |
Natural Selection | A characteristic that makes an individual better suited to its environment may eventually become common in that species through this process |
Adaptations | The behaviors and physical characteristics that allow organisms to live successfully in their environments. |
Niche | The role of an organism in its habitat, or how it makes its living |
Competition | 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. |
Prey | The organism that is killed. |
Symbiosis | A close relationship between two species that benefits at least one of the species. |
Mutualism | A relationship in which both species benefit. |
Commensalism | A relationship in which one species benefits and the other species is neither helped nor harmed. |
Parasitism | One organism living on or inside another organism and harming it. |
Parasite | The organism that benefits (for parasitism) |
Host | The organism that the parasite lives on or inside. |