1|Page
BIO 320 EXAM 3 NEWEST 2026/2027 ACTUAL EXAM
COMPLETE 100 VERIFIED QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||QUICK PASS!!!
Which of the following is an example of an allogenic change
that drives succession?
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
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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
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
An inherent edge of a patch
A) is relatively stable.
B) is usually temporary.
C) is often subject to successional changes over time.
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D) results from natural disturbances or human-related
activities. - ANSWER-A
When a forest gradually merges into a grassland over a wide
area, the border between
the two landscape patches is referred to as a(n)
A) narrow border.
B) convoluted border.
C) perforated border.
D) ecotone. - ANSWER-D
Plants adapted to edge environments tend to be
A) tolerant of shade and prefer moisture.
B) tolerant of shade and dry conditions.
C) intolerant of shade and prefer moisture.
D) intolerant of shade and tolerant of dry conditions. -
ANSWER-D
Which of the following is the least major agent of disturbance?
A) fire
B) flooding
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C) a beaver constructing a dam
D) a rainstorm - ANSWER-D
The size and shape of habitat patches are determined more by
the activities of
animals than by the interaction of geology, topography, and
climate - ANSWER-FALSE
The intensity of a disturbance is measured by the proportion of
total biomass or the
population of a species that is killed or eliminated by a
disturbance. - ANSWER-TRUE
Plants assimilate energy through the process of
A) decomposition.
B) respiration.
C) photosynthesis.
D) regeneration. - ANSWER-C
An ecologist studying productivity in a sample of grasses
measures gross primary
BIO 320 EXAM 3 NEWEST 2026/2027 ACTUAL EXAM
COMPLETE 100 VERIFIED QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||QUICK PASS!!!
Which of the following is an example of an allogenic change
that drives succession?
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
,2|Page
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
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
An inherent edge of a patch
A) is relatively stable.
B) is usually temporary.
C) is often subject to successional changes over time.
,3|Page
D) results from natural disturbances or human-related
activities. - ANSWER-A
When a forest gradually merges into a grassland over a wide
area, the border between
the two landscape patches is referred to as a(n)
A) narrow border.
B) convoluted border.
C) perforated border.
D) ecotone. - ANSWER-D
Plants adapted to edge environments tend to be
A) tolerant of shade and prefer moisture.
B) tolerant of shade and dry conditions.
C) intolerant of shade and prefer moisture.
D) intolerant of shade and tolerant of dry conditions. -
ANSWER-D
Which of the following is the least major agent of disturbance?
A) fire
B) flooding
, 4|Page
C) a beaver constructing a dam
D) a rainstorm - ANSWER-D
The size and shape of habitat patches are determined more by
the activities of
animals than by the interaction of geology, topography, and
climate - ANSWER-FALSE
The intensity of a disturbance is measured by the proportion of
total biomass or the
population of a species that is killed or eliminated by a
disturbance. - ANSWER-TRUE
Plants assimilate energy through the process of
A) decomposition.
B) respiration.
C) photosynthesis.
D) regeneration. - ANSWER-C
An ecologist studying productivity in a sample of grasses
measures gross primary
