APES Unit 2 Review Exam Questions with correct
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 population size.
-Pioneer Species - -In primary succession on a terrestrial site; the plants lichens, and
microbes that first colonize the site.
-Foundation Species - -Species that can create and enhance habitats that can benefit other
species in a community.
-Parasitism - -Symbiotic relationship in which one organism lives in or on another
organism and harms it.
-Mutualism - -Symbiotic relationship in which both species benefit from the relationship.
-Commensalism - -Symbiotic relationship in which one member of the association benefits
and the other is neither helped nor harmed.
-CITES - -An international agreement between governments to ensure that international
trade with wild animals and plants does not threaten their survival.
-Primary Succession - -Land that is bared of soil is colonized by living organisms where
none lived before.
-Secondary Succession - -When an existing community is disturbed, a new one develops
from the biological legacy of the old community.
-Benthos - -Bottom dwellers that either burrow, anchor, or move along the floor. Some
species filter feed.
-Decomposers - -bacteria that break down organic compounds and return nutrients to
producers.
-Estuary - -Partially enclosed area of coastal water where seawater mixes with fresh
water.
-Intertidal Zones - -The area of the shoreline between low and high tides and have many
niches.
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 population size.
-Pioneer Species - -In primary succession on a terrestrial site; the plants lichens, and
microbes that first colonize the site.
-Foundation Species - -Species that can create and enhance habitats that can benefit other
species in a community.
-Parasitism - -Symbiotic relationship in which one organism lives in or on another
organism and harms it.
-Mutualism - -Symbiotic relationship in which both species benefit from the relationship.
-Commensalism - -Symbiotic relationship in which one member of the association benefits
and the other is neither helped nor harmed.
-CITES - -An international agreement between governments to ensure that international
trade with wild animals and plants does not threaten their survival.
-Primary Succession - -Land that is bared of soil is colonized by living organisms where
none lived before.
-Secondary Succession - -When an existing community is disturbed, a new one develops
from the biological legacy of the old community.
-Benthos - -Bottom dwellers that either burrow, anchor, or move along the floor. Some
species filter feed.
-Decomposers - -bacteria that break down organic compounds and return nutrients to
producers.
-Estuary - -Partially enclosed area of coastal water where seawater mixes with fresh
water.
-Intertidal Zones - -The area of the shoreline between low and high tides and have many
niches.
