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 a habitat |
Photosynthesis | The process in which plants and algae make food using water, sunlight, and carbon dioxide |
Species | A group of animals 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 with 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 |
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 an area can support |
Natural Selection | A process that makes an individual better suited to its environment |
Adaptions | The behaviors and physical characteristics that allow organisms to live successfully in their environments |
Niche | The role of an organism in its habitat |
Competition | The struggle between organisms to survive as they attempt to use the same limiting resource |
Predation | An interaction in which an 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 from parasitism |
Host | The organism a parasite lives on or in |
Emigration | Leaving a population |