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BIO 320 EXAM 3 NEWEST 2025/ 2026 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+||LATEST EXAM!!!
The impact of a disturbance is determined by its
A) frequency, period, and scale.
B) period, scale, and type.
C) frequency, intensity, and strength.
D) frequency, intensity, and scale - ANSWER-D
Habitat fragmentation is harmful because no species are
adapted to living along
habitat edges. - ANSWER-FALSE
For a given body size, the home range of carnivores is
greater than that of herbivores - ANSWER-TRUE
The theory of island biogeography was developed for
islands and cannot be applied
to habitat patches within a larger landscape. - ANSWER-
FALSE
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Groups of sites within an area that are at different stages
of succession are known as
A) autosequences.
B) ecotypes.
C) clines.
D) chronosequences. - ANSWER-D
The number of species within a community is usually
greatest when
A) no disturbance occurs.
B) a low frequency of disturbance occurs.
C) an intermediate frequency of disturbance occurs.
D) a high rate of disturbance occurs - ANSWER-C
Succession in a community involves
A) only autotrophic species.
B) only heterotrophic species.
C) both autotrophic and heterotrophic species.
D) only detritivorous species. - ANSWER-C
Which of the following is an example of an allogenic
change that drives succession?
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A) seasonal changes in temperature, photoperiod, and
light intensity
B) increased shading of seedlings by adult trees in a forest
C) increased nitrogen availability in soil due to the
presence of leguminous plants
D) reduced salinity due to surface shading by grasses in a
salt marsh - ANSWER-A
As glaciers in North America melted, formerly glaciated
areas were invaded by
A) ice.
B) tundralike vegetation.
C) boreal forest, dominated by spruce and jack pine.
D) various species of trees, including spruce, white pine,
oaks, and maples. - ANSWER-D
Grasses are usually the first plant species to colonize
sand dunes. - ANSWER-TRUE
The monoclimax hypothesis views succession as the
gradual and progressive
development of the community to the ultimate stage. -
ANSWER-TRUE
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In the early stages of plant succession, shade-intolerant
species are often common. - ANSWER-TRUE
Within a landscape mosaic, patches
A) are composed of relatively heterogeneous
communities.
B) typically lack a distinct boundary.
C) tend to be similar in size.
D) tend to vary in shape. - ANSWER-D
Carbon is released into the atmosphere as carbon dioxide
through the process of
A) photosynthesis.
B) primary production.
C) respiration.
D) fixation. - ANSWER-C
Carbon dioxide concentrations fluctuate in predictable
seasonal patterns on the surface of
the planet largely as a result of
A) the influence of vegetation patterns in tropical systems.
BIO 320 EXAM 3 NEWEST 2025/ 2026 ACTUAL EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) |ALREADY GRADED A+||LATEST EXAM!!!
The impact of a disturbance is determined by its
A) frequency, period, and scale.
B) period, scale, and type.
C) frequency, intensity, and strength.
D) frequency, intensity, and scale - ANSWER-D
Habitat fragmentation is harmful because no species are
adapted to living along
habitat edges. - ANSWER-FALSE
For a given body size, the home range of carnivores is
greater than that of herbivores - ANSWER-TRUE
The theory of island biogeography was developed for
islands and cannot be applied
to habitat patches within a larger landscape. - ANSWER-
FALSE
,2|Page
Groups of sites within an area that are at different stages
of succession are known as
A) autosequences.
B) ecotypes.
C) clines.
D) chronosequences. - ANSWER-D
The number of species within a community is usually
greatest when
A) no disturbance occurs.
B) a low frequency of disturbance occurs.
C) an intermediate frequency of disturbance occurs.
D) a high rate of disturbance occurs - ANSWER-C
Succession in a community involves
A) only autotrophic species.
B) only heterotrophic species.
C) both autotrophic and heterotrophic species.
D) only detritivorous species. - ANSWER-C
Which of the following is an example of an allogenic
change that drives succession?
,3|Page
A) seasonal changes in temperature, photoperiod, and
light intensity
B) increased shading of seedlings by adult trees in a forest
C) increased nitrogen availability in soil due to the
presence of leguminous plants
D) reduced salinity due to surface shading by grasses in a
salt marsh - ANSWER-A
As glaciers in North America melted, formerly glaciated
areas were invaded by
A) ice.
B) tundralike vegetation.
C) boreal forest, dominated by spruce and jack pine.
D) various species of trees, including spruce, white pine,
oaks, and maples. - ANSWER-D
Grasses are usually the first plant species to colonize
sand dunes. - ANSWER-TRUE
The monoclimax hypothesis views succession as the
gradual and progressive
development of the community to the ultimate stage. -
ANSWER-TRUE
, 4|Page
In the early stages of plant succession, shade-intolerant
species are often common. - ANSWER-TRUE
Within a landscape mosaic, patches
A) are composed of relatively heterogeneous
communities.
B) typically lack a distinct boundary.
C) tend to be similar in size.
D) tend to vary in shape. - ANSWER-D
Carbon is released into the atmosphere as carbon dioxide
through the process of
A) photosynthesis.
B) primary production.
C) respiration.
D) fixation. - ANSWER-C
Carbon dioxide concentrations fluctuate in predictable
seasonal patterns on the surface of
the planet largely as a result of
A) the influence of vegetation patterns in tropical systems.
