According to the principle of competitive exclusion, two species cannot continue to occupy the same
_____.
environmental habitat
biome
range
ecological niche
territory - ecological niche
Of the choices below, which best describes the effect predation has on the predator/prey organisms
involved in the relationship?
benefit ... no effect
no effect ... benefit
harmed ... harmed
benefit ... benefit
benefit ... harmed - benefit ... harmed
The term used to describe a harmless organism resembling a harmful one is _____.
Batesian mimicry
warning coloration
cryptic coloration
aposematic coloration
Müllerian mimicry - Batesian mimicry
Cellulose-digesting microorganisms live in the guts of termites and ruminant mammals. The
microorganisms have a home and food, and their hosts gain more nutrition from their meals. This
relationship is an example of _____.
commensalism
parasitism
, herbivory
predation
mutualism - mutualism
An organism's "trophic level" refers to _____.
where it lives
the rate at which it uses energy
whether it is early or late in ecological succession
its food source
the intensity of its competition with other species - its food source
Keystone species are those species _____.
whose absence would cause major disruption in a community
with the largest number of individuals in a community
that live primarily on or under rocks and stones
that provide important foods and medicines
that have the most biomass in the community - whose absence would cause major disruption in a
community
Which of the following best illustrates ecological succession?
A mouse eats seeds, and an owl eats the mouse.
Introduced pheasants increase, and native quail populations disappear.
Overgrazing causes a nutrient loss from soil.
Decomposition in soil releases nitrogen that plants can use.
Grass grows on a sand dune, is replaced by shrubs, and then by trees. - Grass grows on a sand dune, is
replaced by shrubs, and then by trees.
According to MacArthur and Wilson's hypothesis of island biogeography, species immigration and
extinction rates on a particular island correlate to _____.
the number of other islands in the archipelago
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