bio 112 exams Verified Exam Questions and Answers Latest update
2026/2027
Question:
List the hierarchy of taxonomic groups from most inclusive to least inclusive.
Answer:
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
Question:
A ___ is a group of populations whose members have the potential to interbreed in nature and produce
viable, fertile offspring.
Answer:
Species
Question:
A(n) ___ is a characteristic of an organism that enhances its survival and reproduction in a specific
environment.
Answer:
Adaptation
Question:
Average ____ is the average percent of loci that are heterozygous in a population; this is how we
quantify ____.
Answer:
Heterozygosity; genetic variability
Question:
Black jaguars being found in equal proportions to spotted jaguars is an example of which type of
selection?
Answer:
Disruptive
Question:
female bullfrogs are attracted to and choose males with the deepest voices to mate with. This is an
example of which type of selection?
Answer:
intersexual
,Question:
Having two alleles present for a trait preserves genetic variation in a population. This is called ____
Answer:
Heterozygote advantage
Question:
If an individual has more surviving offspring than another, the first individual is said to have greater
____ due to _____.
Answer:
Relative fitness ; a larger contribution of genes to the gene pool relative to the contribution of others
Question:
Male zebras (stallions) will compete with each other for dominion and mating rights over a herd of
female zebras (mares). This is an example of which type of selection?
Answer:
intrasexual
Question:
On average, male Siberian tigers weigh between 400 and 700 pounds; very few are found that weigh
less or more than this average range. This is an example of what type of selection?
Answer:
Stabilizing
Question:
The ___ effect occurs when a few individuals that become isolated from a larger population establish a
new population.
Answer:
Founder
Question:
The ___ effect occurs when a sudden change in the environment drastically reduces the size of the
population.
Answer:
bottleneck
, Question:
The ___ species concept characterizes a species by body shape; while the ___ species concept defines
a species as the smallest group of individuals that share a common ancestor.
Answer:
Morphological; phylogenetic
Question:
True or False: Only characteristics that are heritable may be passed to the next generation.
Answer:
true The conditions of the Hardy-Weinberg Equilibrium are:
Question:
1) No mutations
2) Random mating
3) No natural selection
4) Extremely large population size
5) No gene flow
6) Emigration and immigration occurring
Answer:
1,2,3,4,5
Question:
True or False: A bionomial is a two-part scientific name for an organism that is recognized only in the
country where it is found.
Answer:
F
Question:
True or False: Evolution is defined as descent with modification.
Answer:
T
Question:
True or False: Postzygotic barriers include reduced hybrid viability, reduced hybrid fertility, and
hybrid breakdown.
Answer:
T
2026/2027
Question:
List the hierarchy of taxonomic groups from most inclusive to least inclusive.
Answer:
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
Question:
A ___ is a group of populations whose members have the potential to interbreed in nature and produce
viable, fertile offspring.
Answer:
Species
Question:
A(n) ___ is a characteristic of an organism that enhances its survival and reproduction in a specific
environment.
Answer:
Adaptation
Question:
Average ____ is the average percent of loci that are heterozygous in a population; this is how we
quantify ____.
Answer:
Heterozygosity; genetic variability
Question:
Black jaguars being found in equal proportions to spotted jaguars is an example of which type of
selection?
Answer:
Disruptive
Question:
female bullfrogs are attracted to and choose males with the deepest voices to mate with. This is an
example of which type of selection?
Answer:
intersexual
,Question:
Having two alleles present for a trait preserves genetic variation in a population. This is called ____
Answer:
Heterozygote advantage
Question:
If an individual has more surviving offspring than another, the first individual is said to have greater
____ due to _____.
Answer:
Relative fitness ; a larger contribution of genes to the gene pool relative to the contribution of others
Question:
Male zebras (stallions) will compete with each other for dominion and mating rights over a herd of
female zebras (mares). This is an example of which type of selection?
Answer:
intrasexual
Question:
On average, male Siberian tigers weigh between 400 and 700 pounds; very few are found that weigh
less or more than this average range. This is an example of what type of selection?
Answer:
Stabilizing
Question:
The ___ effect occurs when a few individuals that become isolated from a larger population establish a
new population.
Answer:
Founder
Question:
The ___ effect occurs when a sudden change in the environment drastically reduces the size of the
population.
Answer:
bottleneck
, Question:
The ___ species concept characterizes a species by body shape; while the ___ species concept defines
a species as the smallest group of individuals that share a common ancestor.
Answer:
Morphological; phylogenetic
Question:
True or False: Only characteristics that are heritable may be passed to the next generation.
Answer:
true The conditions of the Hardy-Weinberg Equilibrium are:
Question:
1) No mutations
2) Random mating
3) No natural selection
4) Extremely large population size
5) No gene flow
6) Emigration and immigration occurring
Answer:
1,2,3,4,5
Question:
True or False: A bionomial is a two-part scientific name for an organism that is recognized only in the
country where it is found.
Answer:
F
Question:
True or False: Evolution is defined as descent with modification.
Answer:
T
Question:
True or False: Postzygotic barriers include reduced hybrid viability, reduced hybrid fertility, and
hybrid breakdown.
Answer:
T
