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Ecology 7th

QuestionAnswer
Autotroph an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
Heterotroph an organism deriving its nutritional requirements from complex organic substances.
Organism an individual animal, plant, or single-celled life form.
Habitat the natural home or environment of an animal, plant, or other organism.
Biotic factor a living organism that shapes its environment.
Abiotic factor a non-living part of an ecosystem that shapes its environment.
Species a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
Population a particular section, group, or type of people or animals living in an area or country.
Community an interacting group of various species in a common location
Ecosystem a biological community of interacting organisms and their physical environment
Ecology the branch of biology that deals with the relations of organisms to one another and to their physical surroundings
Immigration an animal establishes a home in a habitat because it has resources it can utilize or because the habitat is ideal for them.
Emigration The animal leaves its home because the habitat is no longer ideal for them
Population density the concentration of individuals within a species in a specific geographic locale.
Limiting factor anything that constrains a population's size and slows or stops it from growing.
Carrying capacity the number of people, other living organisms, or crops that a region can support without environmental degradation.
Natural selection the process whereby organisms better adapted to their environment tend to survive and produce more offspring.
Adaptation any heritable trait that helps an organism, such as a plant or animal, survive and reproduce in its environment.
Niche the role an organism plays in a community
Competition A symbiotic relationship between or among living things that compete for a limited resources,
Predation the preying of one animal on others.
Mutualism symbiosis that is beneficial to both organisms involved.
Commensalism an association between two organisms in which one benefits and the other derives neither benefit nor harm.
Parasitism the practice of living as a parasite in or on another organism.
Parasite an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.
Host an organism that harbors a parasite and supplies it with nutrients.
Succession a number of people or things sharing a specified characteristic and following one after the other.
Primary succession happens when a new patch of land is created or exposed for the first time.
Pioneer species hardy species which are the first to colonize barren environments
Secondary succession type of ecological succession (the evolution of a biological community's ecological structure)
Created by: ballman08
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