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Chapter 18 Key Terms

Jaeden ok

TermDefinition
Ecosystem All the living and nonliving things that interact in that area.
Habitat The place where an organism lives and provides the things it needs to survive.
Biotic Factor A living part of an ecosystem.
Abiotic factor A nonliving part of an ecosystem.
Photosynthesis The process by which plants use water, plus carbon dioxide and energy from the sun, to make food.
Species A group of organisms that are similar and reproduce to produce fertile offspring.
Population All the members of one species in a particular area.
Community All the different populations that live together in a area.
Ecology The study of how living things interact with each other and their environment.
Population Density The number of individuals in a specific area.
Estimate An approximation on a number.
Birth Rate The amount of births in a population in a certain amount of time.
Death Rate The amount of deaths in a population in a certain amount of time.
Immigration Moving into a population.
Emigration Leaving a population.
Limiting Factor An environmental factor that prevents a population from increasing.
Natural Selection Process by which individuals are more adapted to the environment.
Adaption The behaviors and physical characteristics of species tha allow them to live successfully.
Niche An organisms particular role in an ecosystem.
Competition The struggle between organisms for the limited sources in a habitat.
Predation An interaction in which one organism kills and eats another.
Predator The organism that does the killing in predation.
Prey An organism that is killed in predation.
Sybiosis A close relationship between species that benefits at least one of the species
Mutualism A relationship between two species in which both species benefit.
Commensalism A relationship between two species in which one species benefits and the other is neither helped or harmed.w
Parasitism The practice of living as a parasite in or on another organism.
Parasite The organism that benefits by living on or in a host in parasitism.
Host The organism that a parasite lives in or on in parasitism
Created by: popdooog123
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