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Sci. Chapter 18
Question | Answer |
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Ecosystem | All the nonliving things that interact in a particular area |
Habitat | The place where an organism lives and that provides the things the organism needs |
Biotic factors | The living parts of an ecosystem |
Abiotic factors | The non- living parts of an ecosystem |
Photosynthesis | These organisms use water, along with sunlight and carbon dioxide, to make food in a process |
Population | All the members in a species in a particular area are referred |
Community | All the different populations that live together in a area |
Ecology | The study of how living things interact with each other and with it's environment |
Population Density | the number of individuals in a specific area |
Estimate | Is an approximation of a number, based on reasonable assumptions |
Birth Rate | Is the number of births in a population in a certain amount of time |
Death Rate | Is the number of deaths in a population in a certain amount of time |
Immigration | Moving into a population |
Emigration | Moving out of a population |
Limiting Factors | Is an environmental factor that prevents a population from increasing |
Carrying Capacity | The largest population that an environment can support |
Natural Selection | The changes that make organism better suited to their environments develop through a process |
Adaptations | The behaviors and physical characteristics of species that allow them to live successfully in their environment |
Niche | An organisim particular role, |
Competition | The struggle between organisms to survive in a habitat with limited resources |
Predation | An interaction in which one organism kills and eats another |
Predator | The organism that does the killing |
Prey | The organism that is killed |
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 |
Symbiosis | Is a close relationship between two species that benefits at least one of the species |
Parasitism | Involves one organism living on or inside another organism and harming it |
Parasite | The organism that benefits |
Host | The organism it lives on or in |