BIO 322 Exam 2 QUESTIONS WITH
CORRECT ANSWERS
Demographic stochasticity is? - 🔹CORRECT ANSWERS
✔✔Random variability in survival and/or reproduction among
individuals within a population
Environmental stochasticity is? - 🔹CORRECT ANSWERS
✔✔Variation in birth & death rates in response to weather, disease,
competition, predation, or other factors external to the population.
What does stochastic mean? - 🔹CORRECT ANSWERS
✔✔randomly determined; having a random probability
distribution or pattern that may be analyzed statistically but may
not be predicted precisely.
The Allee effect is? - 🔹CORRECT ANSWERS ✔✔The positive
correlation between population size and reproduction and survival
of individuals.
,What is genetic drift? - 🔹CORRECT ANSWERS ✔✔Change in
gene frequencies by chance, unrelated to the alleles themselves.
What is polymorphism? - 🔹CORRECT ANSWERS ✔✔The
fraction of examined genes for which multiple forms, or alleles
exist.
You are monitoring the population of the Karner blue butterfly,
and you estimate with mark recapture methods that the total
population size is 2540. According to a meta-analysis conducted by
Frankham et al. 2014, the effective population size (Ne) is closest
to:
A. 32-100
B. 2500-5000
C. 1250-1470
D. 250-500
E. 12,500-14,700 - 🔹CORRECT ANSWERS ✔✔D. 250-500
What is the mark recapture method for estimating population size
EQUATION? - 🔹CORRECT ANSWERS ✔✔(# originally
marked)/(Population size (N))= (#marked recapture)/(# total
,recaptures)
Which of the following is NOT a method to calculate population
trends through time? - 🔹CORRECT ANSWERS ✔✔Mark-capture
experiment, performed one time
Population viability is used to predict ________. - 🔹CORRECT
ANSWERS ✔✔The probability of extinction of a species.
The answer to the single large or several small (SLOSS) debate
concerning optimal reserve design is?
A. a single large reserve is the best choice because a large reserve
will harbor more distinct species
B. a collection of several small reserves is the best choice because
more distinct species will be protected when reserves are more
widely dispersed across the landscape.
C. A and B
D. None of the above - 🔹CORRECT ANSWERS ✔✔C. A and B
In the case of the spotted owl, what percent of heterogyosity is lost
due to subpopulation inbreeding? - 🔹CORRECT ANSWERS
, ✔✔A. 27.5%
Say you calculate a large value of Fst (heterosygote defecit) in a
subpopulation you are monitoring relative to Fst values that you
calculate for similar types of species. This means that: -
🔹CORRECT ANSWERS ✔✔A dispersal corridor may be a good
investment because migration between subpopulations is currently
limited.
Habitat fragmentation can lead to all of the following except:
A. edge effects
B. environmental stochasticity
C. metapopulation dynamics
D. Faunal relaxation within patches - 🔹CORRECT ANSWERS
✔✔B. Environmental stochasticity
What are edge effects? - 🔹CORRECT ANSWERS ✔✔In ecology,
edge effects are changes in population or community structures
that occur at the boundary of five or more habitats. Areas with
small habitat fragments exhibit especially pronounced edge effects
that may extend throughout the range.
CORRECT ANSWERS
Demographic stochasticity is? - 🔹CORRECT ANSWERS
✔✔Random variability in survival and/or reproduction among
individuals within a population
Environmental stochasticity is? - 🔹CORRECT ANSWERS
✔✔Variation in birth & death rates in response to weather, disease,
competition, predation, or other factors external to the population.
What does stochastic mean? - 🔹CORRECT ANSWERS
✔✔randomly determined; having a random probability
distribution or pattern that may be analyzed statistically but may
not be predicted precisely.
The Allee effect is? - 🔹CORRECT ANSWERS ✔✔The positive
correlation between population size and reproduction and survival
of individuals.
,What is genetic drift? - 🔹CORRECT ANSWERS ✔✔Change in
gene frequencies by chance, unrelated to the alleles themselves.
What is polymorphism? - 🔹CORRECT ANSWERS ✔✔The
fraction of examined genes for which multiple forms, or alleles
exist.
You are monitoring the population of the Karner blue butterfly,
and you estimate with mark recapture methods that the total
population size is 2540. According to a meta-analysis conducted by
Frankham et al. 2014, the effective population size (Ne) is closest
to:
A. 32-100
B. 2500-5000
C. 1250-1470
D. 250-500
E. 12,500-14,700 - 🔹CORRECT ANSWERS ✔✔D. 250-500
What is the mark recapture method for estimating population size
EQUATION? - 🔹CORRECT ANSWERS ✔✔(# originally
marked)/(Population size (N))= (#marked recapture)/(# total
,recaptures)
Which of the following is NOT a method to calculate population
trends through time? - 🔹CORRECT ANSWERS ✔✔Mark-capture
experiment, performed one time
Population viability is used to predict ________. - 🔹CORRECT
ANSWERS ✔✔The probability of extinction of a species.
The answer to the single large or several small (SLOSS) debate
concerning optimal reserve design is?
A. a single large reserve is the best choice because a large reserve
will harbor more distinct species
B. a collection of several small reserves is the best choice because
more distinct species will be protected when reserves are more
widely dispersed across the landscape.
C. A and B
D. None of the above - 🔹CORRECT ANSWERS ✔✔C. A and B
In the case of the spotted owl, what percent of heterogyosity is lost
due to subpopulation inbreeding? - 🔹CORRECT ANSWERS
, ✔✔A. 27.5%
Say you calculate a large value of Fst (heterosygote defecit) in a
subpopulation you are monitoring relative to Fst values that you
calculate for similar types of species. This means that: -
🔹CORRECT ANSWERS ✔✔A dispersal corridor may be a good
investment because migration between subpopulations is currently
limited.
Habitat fragmentation can lead to all of the following except:
A. edge effects
B. environmental stochasticity
C. metapopulation dynamics
D. Faunal relaxation within patches - 🔹CORRECT ANSWERS
✔✔B. Environmental stochasticity
What are edge effects? - 🔹CORRECT ANSWERS ✔✔In ecology,
edge effects are changes in population or community structures
that occur at the boundary of five or more habitats. Areas with
small habitat fragments exhibit especially pronounced edge effects
that may extend throughout the range.
