Ecology--Interactions
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| niche | everything an organism does and everything the organism needs in its environment
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| natural selection | responsible for evolutionary changes
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| population | a group of organisms of the same sepecies living in the same area
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| herbivore | organisms that eat plants
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| biotic | the living part of an ecosystem
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| abiotic | the nonliving part of an ecosystemcomm
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| host | organism on which a parasite lives
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| habitat | the place in which an organism lives
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| carnivore | animals that prey upon other animals
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| omnivore | organisms that eat both plants and animals
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| feeding level | the location of an organism along a food chain
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| producers | first feeding level in a food chain
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| herbivores | second feeding level in a food chaing
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| useable energy | decreases as one moves from one energy level to the next energy level
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| competition | interaction in which organisms struggle against each other in obtaining the resources need for life
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| living organisms that catch, kill, and eat other living things
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| prey |
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| symbiosis | a close relationship between two organisms in which one organism lives near, on, or even inside another organism and in which at least one organism benefits
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| commensalism | type of relationship in which one organism benefits from the relationship and the other benefits or is harmed
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| mutualism | interaction between two organism in which both organims benefit is some manner
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| parasitism | relationship between two organisms in which one benefits while the second is harmed in some fashion
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| parasitism example | dog and flea --example
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| mutualism example | bee and flowers--example
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| commensalism | you and the mites living in your eyebrows
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| organism | single living individual
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| species | a group of organisms that can breed and produce viable offspring
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| population | same species in the same place at the same time
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| community | all the populations living in an area and interacting with each other
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| ecosystem | a biological community and the environment it lives in
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| biosphere | all the ecosystems found on earth
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| tolerance limits |
Minimum and maximum levels beyond which a particular species cannot survive or reproduce.
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| adaptation | A trait that allows a species to survive more easily and reprod
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| evolution | Inheritance of specific genetic traits that control adaptations, giving a species an advantage in an environment.
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| natural selection | Describes process where better competitors survive and reproduce more successfully.
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| predation | Organism is hunted and killed by another
Includes parasites, bacteria, viruses
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| more than one organism attempting to use same resources
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| divergent | Separation of one species into new species.
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| covergent | Unrelated organisms evolve to look and act alike.
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| habitat | Set of environmental conditions in which a particular organism lives
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| ecological niche | Description of role played by a species in a biological community.
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| Opportunistic Species | Quickly appears when any opening in an ecosystem arises.
Many are weeds.
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| pioneer species | Able to quickly colonize new ground where nothing else is growing
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| keystone species | A species whose impact on its ecosystem is especially large and influential.
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| predator | Any organism that feeds directly on another living organism is termed a ________________
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| intraspecific competition | Competition among members of the same species.
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| interspecific competition | Competition between members of different species.
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| sybiosis | Intimate living together of members of two or more species.
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| commensalism | One member benefits while other is neither benefited nor harmed.
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| mutalism | Both members benefit.
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| parasitism | One member benefits at the expense of other.
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| commensalism | Barnacles create homes by attaching themselves to whales. The whales are unaffected.
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