The student is expected to: 12A interpret relationships, including predation, parasitism, commensalism, mutualism, and competition among organisms

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The student is expected to12A interpret
relationships,including predation,
parasitism,commensalism, mutualism,
andcompetition among organisms
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KEY CONCEPT Organisms interact as individuals
and as populations.
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Competition and predation are two important ways
inwhich organisms interact.

• Competition occurs when two organisms fight for
  thesame limited resource.
• Intraspecificcompetition
• Interspecificcompetition

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• Predation occurs when one organism captures and
  eats another.

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• There are three major types of symbiotic
  relationships.

• Mutualism both organisms benefit

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• There are three major types of symbiotic
  relationships.

• Commensalism one organism benefits, the other is
  unharmed

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• There are three major types of symbiotic
  relationships.

• Parasitism one organism benefits, the other is
  harmed

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• There are three major types of symbiotic
  relationships.

• Parasitism meet their needs as ectoparasites
  (such as leeches) and endopaasites (such as
  hookworms)