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Exam (elaborations)

APES Unit 2 Review Questions and Answers

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APES Unit 2 Review Questions and Answers Indicator Species Species whose tolerance limits can be used to judge the environmental conditions. Keystone Species A species whose impact on its community or ecosystem are much larger and more influential than would be expected from its populatio...

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  • December 1, 2024
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  • 2024/2025
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  • APES
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APES Unit 2 Review Questions and
Answers
Indicator Species - answer Species whose tolerance limits can be used to judge the
environmental conditions.

Keystone Species - answer A species whose impact on its community or ecosystem
are much larger and more influential than would be expected from its population size.

Pioneer Species - answer In primary succession on a terrestrial site; the plants
lichens, and microbes that first colonize the site.

Foundation Species - answer Species that can create and enhance habitats that can
benefit other species in a community.

Parasitism - answer Symbiotic relationship in which one organism lives in or on
another organism and harms it.

Mutualism - answer Symbiotic relationship in which both species benefit from the
relationship.

Commensalism - answer Symbiotic relationship in which one member of the
association benefits and the other is neither helped nor harmed.

CITES - answer An international agreement between governments to ensure that
international trade with wild animals and plants does not threaten their survival.

Primary Succession - answer Land that is bared of soil is colonized by living
organisms where none lived before.

Secondary Succession - answer When an existing community is disturbed, a new
one develops from the biological legacy of the old community.

Benthos - answer Bottom dwellers that either burrow, anchor, or move along the
floor. Some species filter feed.

Decomposers - answer bacteria that break down organic compounds and return
nutrients to producers.

Estuary - answer Partially enclosed area of coastal water where seawater mixes with
fresh water.

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