A group of similar organisms that can reproduce to produce FERTILE offspring
Species
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all of the organisms of one species in an ecosystem
Population
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All organisms of all populations in an ecosystem
Community
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The study of inter-relationships between organisms & their environment
This environment includes living (biotic) factors (e.g. competition & predation) & non-living (abiotic) factors (e.g. temperature & rainfall).
Ecology
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A self contained area including the biotic (living) community and abiotic (non-living) components interacting with one another
Ecosystem
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the category of living factors in the environment of an organism that affect population size
Biotic factors
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Two examples of biotic factors that affect the population size of an organism
disease,
predation,
competition
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the non-living / physical part of an ecosystem that can affect population size
This describes how an organism fits into the environment. It describes what a species is like, where it occurs, how it behaves, its interactions with other species and how it responds to its environment.
Niche
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Where one organism is consumed by another
Predation
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Competition between organisms of the SAME species e.g. for food or mates
Intraspecific competition
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competition between organisms of DIFFERENT species e.g. for food
Interspecific competition
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Differences between organisms of the same species
Intraspecific variation
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The differences between organisms of different species.