Lesson 3 – Flashcards
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Birth Rate
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The number of births per, 1,000 individuals for a certain period.
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Death Rate
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The number of death per 1,000 individuals for a certain period.
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Immigration
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Movements of individuals into a populations area.
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Emmigration
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Movements of individuals out of a populations area.
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Population Density
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The number of individuals in a area of specific species.
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Limiting Factor
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An environmental factor that causes a population to decrease in size.
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Carrying capacity
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The largest population that a particular environment can support.
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Natural selection
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The process by which organisms that are best adapted to the environment are most likely to survive and reproduce.
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Adaptions
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An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment.
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Niche
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How an organism makes its living and interacts with the biotic and abiotic factors in its habitat
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Competition
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The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time
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Prey
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An organism that is killed and eaten by another organism in a predation interaction.
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Predator
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The organism that does the killing in a predation interaction.
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Predation
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An interaction in which one organism kills another for food or nutrients.
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Symbiosis
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Any relationship in which two species live closely together and that benefit at least one of the species.
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Mutualism
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A type of symbiosis in which both species benefit from living together.
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Host
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An organism that a parasite lives with, in, or, on, and provides a source of energy or a suitable environment for the parasite to live.
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Parasite
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The organism that benefits by living with, on, or in a host in a parasitism interaction.
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Parasitism
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A type of symbiosis in which one organism lives with on, or in a host and harms it.
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Commensalism
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A type of symbiosis between two species in which one species benefits and the other species is neither helped or harmed.
