BIO205 EXAM REVIEW QUESTIONS
WITH ANSWERS LATEST UPDATE
ALREADY GRADED A+
(T/F) Both a mixed deciduous forest and a healthy tree are
dynamic steady states - correct answer- True
(T/F) Climax communities represent a stable seral stage
that no longer experiences change in species composition
- correct answer- False - all seral stages
experience change in species composition
(T/F) Human activities often inadvertently reintroduce
nutrients into aquatic systems (e.g. runoff from
agricultural fields). This would most likely result in a
decrease in aquatic species richness - correct
answer- True - an increase in fertilizers (i.e.,
resources) doesn't mean there will be an increase in
species richness. Actually, more resources can result in
lower diversity because competitive species will dominant
those resources and bleed other species dry
,2 species of butterflies live in the same
habitat/geographic location but one is found in the late
spring, while the other is only found in the early autumn.
What type of reproduction barrier is this? - correct
answer- Prezygotic - they can't even attempt to
fertilize
A crucian carp develops a muscular hump on its back that
increases its swimming acceleration in response to
predators. This is an example of:
a. chemical defense
b. structural defense
c. behavioural defense
d. cypsis - correct answer- b. structural defense
A group of plants require cool, humid climates and prefer
low-light conditions in the forest understory. This
information provides a description for its:
a. geographic niche
b. fundamental niche
c. geographic range
,d. realized niche - correct answer- b.
fundamental niche
A mammal is only found in the hills of a part of India. This
would be what type of species?
a. cosmopolitan
b. endemic
c. localized
d. extirpated - correct answer- b. endemic
A population has an intrinsic growth rate of 2.1, a
mortality rate of 0.7, and a population size of 50, and is
experiencing exponential growth. What is the rate of
population increase at any given point in time?
a. 35
b. 140
c. 105
d. 70 - correct answer- c. 105
, A population is influenced by delayed density dependent
factors. If tau = 0.5 and r = 1.2. What type of oscillations
would this population experience?
a. dampened
b. no
c. stable - correct answer- a. dampened - (0.5)
(1.2) = 0.6 - this value is between 0.37 and 1.57, which
corresponds to dampened oscillations, where the
population experiences somewhat of an overshoot and
die-off, but it eventually levels off
A population of cod became drastically smaller following
years of overharvesting, to the point where only 1% of the
original population remained. What is this an example of?
a. founder effect
b. recombination
c. stabilizing selection
d. bottleneck effect - correct answer- d.
bottleneck effect
WITH ANSWERS LATEST UPDATE
ALREADY GRADED A+
(T/F) Both a mixed deciduous forest and a healthy tree are
dynamic steady states - correct answer- True
(T/F) Climax communities represent a stable seral stage
that no longer experiences change in species composition
- correct answer- False - all seral stages
experience change in species composition
(T/F) Human activities often inadvertently reintroduce
nutrients into aquatic systems (e.g. runoff from
agricultural fields). This would most likely result in a
decrease in aquatic species richness - correct
answer- True - an increase in fertilizers (i.e.,
resources) doesn't mean there will be an increase in
species richness. Actually, more resources can result in
lower diversity because competitive species will dominant
those resources and bleed other species dry
,2 species of butterflies live in the same
habitat/geographic location but one is found in the late
spring, while the other is only found in the early autumn.
What type of reproduction barrier is this? - correct
answer- Prezygotic - they can't even attempt to
fertilize
A crucian carp develops a muscular hump on its back that
increases its swimming acceleration in response to
predators. This is an example of:
a. chemical defense
b. structural defense
c. behavioural defense
d. cypsis - correct answer- b. structural defense
A group of plants require cool, humid climates and prefer
low-light conditions in the forest understory. This
information provides a description for its:
a. geographic niche
b. fundamental niche
c. geographic range
,d. realized niche - correct answer- b.
fundamental niche
A mammal is only found in the hills of a part of India. This
would be what type of species?
a. cosmopolitan
b. endemic
c. localized
d. extirpated - correct answer- b. endemic
A population has an intrinsic growth rate of 2.1, a
mortality rate of 0.7, and a population size of 50, and is
experiencing exponential growth. What is the rate of
population increase at any given point in time?
a. 35
b. 140
c. 105
d. 70 - correct answer- c. 105
, A population is influenced by delayed density dependent
factors. If tau = 0.5 and r = 1.2. What type of oscillations
would this population experience?
a. dampened
b. no
c. stable - correct answer- a. dampened - (0.5)
(1.2) = 0.6 - this value is between 0.37 and 1.57, which
corresponds to dampened oscillations, where the
population experiences somewhat of an overshoot and
die-off, but it eventually levels off
A population of cod became drastically smaller following
years of overharvesting, to the point where only 1% of the
original population remained. What is this an example of?
a. founder effect
b. recombination
c. stabilizing selection
d. bottleneck effect - correct answer- d.
bottleneck effect
