1. What event marks the end of the Paleozoic era?
a) The K-Pg (K-T) extinction
b) The first signs of life
c) The Permian extinction
d) The Cambrian explosion
e) The diversification of mammals
2. Thomas Malthus proposed a theory that was based on which of the following observations?
a) Populations will develop ways to access unlimited resources so that they and their offspring
can survive
b) The free market is guided to produce the right amount and variety of goods by a so-called
"invisible hand"
c) Population numbers are kept in check because of natural disasters that limit the
competition for resources
d) Populations will grow linearly while food supplies grow geometrically
e) The world we live in today is a result of a steady accumulation of minute changes
3. Cuvier had discovered that species have gone extinct by looking at ancient fossil records. How
did this discovery contribute to the proof of Darwin’s theory of evolution?
a) This proved stromatolites were important for the formation of Earth’s atmosphere but are no
longer useful today
b) This proved that extinction is necessary for new species to evolve on Earth
c) This proved that species are mutable and are subject to change
d) This proved that transitional forms are not able to survive
e) Cuvier’s discovery did not contribute to Darwin’s theory of evolution
4. Lucy has a genetic disorder caused by the deletion of one gene that is important for producing
an important receptor that affects her blood pressure, blood glucose levels, and overall metabolic
rate. Which of the following extensions of Mendelian genetics explains this?
a) Incomplete dominance
b) Pleiotropy
c) Epistasis
d) Polygenic inheritance
e) Codominance
,5. Which of the following is an example of codominance?
a) A lizard that changes color when laying in the sun where it is warmer than when it is lying in
the shade
b) A person that is homozygous for type A blood and has a genotype of AA
c) Multiple genes that additively contribute to the hue of the feather color of a bird
d) A bird that exhibits feather colors from both parents
e) A flower that exhibits a petal color that is a blend of both parent petal colors
6. Which of the following cell types undergo the process of crossing over?
a) Blood cells
b) Egg cells
c) Pollen cells
d) Heart cells
e) Both B and C are correct
7. The table below represents the difference in the Cytochrome C gene between various animals
to humans. Use the table to construct a phylogeny consisting of the species listed in the table.
Where should Dog and Gray kangaroo be placed on the tree below, respectively?
Species Number of
differences
Human 0
Rhesus monkey 8
Dog 15
Horse 25
Gray kangaroo 38
Lamprey 125
a) 3 and 5
b) 4 and 6
c) 4 and 2
d) 1 and 3
e) 3 and 6
8. A purebred dog breeder often times chooses to breed two dogs together that have very similar
characteristics in order to create offspring that best reflect the common characteristics unique to
that breed. What effect does this have on the population?
, a) It increases the allele frequency of the common trait
b) It decreases the allele frequency of the common trait
c) It increases the frequency of heterozygotes
d) It decreases the frequency of heterozygotes
e) It has no effect on the population
9. Which of the following evolutionary forces most likely lead to a decrease in genetic variability
within a population?
a) Genetic drift
b) Mutation
c) Migration
d) Selection
e) Recombination
10. Which of the following is true of disruptive selection?
a) It results from an environmental change that shifts the mean in one direction
b) It results when one version of a trait works best for the species
c) It results from selection for both extreme versions of the trait
d) It results from stabilization of the population variation around the best version of the trait
e) It results from the increased fitness of the heterozygote
11. In Swiss starlings, genotypes that lead to a clutch size (the number of eggs a bird lays) of 5
usually have more surviving young than birds who lay too few or too many eggs. This is an
example of ...
a) disruptive selection
b) sexual selection
c) stabilizing selection
d) directional selection
e) incomplete dominant selection
12. You are on a research expedition to study the majestic peacocks in India. You observe from a
distance a female peacock choosing a male peacock with brightly colored plumage with long
tails as her mate. You also notice that there are quite a few birds with a brightly colored plumage
and large tails in the vicinity. From BIO200 you know that the long tails of the male peacocks is
indicative of…
a) The K-Pg (K-T) extinction
b) The first signs of life
c) The Permian extinction
d) The Cambrian explosion
e) The diversification of mammals
2. Thomas Malthus proposed a theory that was based on which of the following observations?
a) Populations will develop ways to access unlimited resources so that they and their offspring
can survive
b) The free market is guided to produce the right amount and variety of goods by a so-called
"invisible hand"
c) Population numbers are kept in check because of natural disasters that limit the
competition for resources
d) Populations will grow linearly while food supplies grow geometrically
e) The world we live in today is a result of a steady accumulation of minute changes
3. Cuvier had discovered that species have gone extinct by looking at ancient fossil records. How
did this discovery contribute to the proof of Darwin’s theory of evolution?
a) This proved stromatolites were important for the formation of Earth’s atmosphere but are no
longer useful today
b) This proved that extinction is necessary for new species to evolve on Earth
c) This proved that species are mutable and are subject to change
d) This proved that transitional forms are not able to survive
e) Cuvier’s discovery did not contribute to Darwin’s theory of evolution
4. Lucy has a genetic disorder caused by the deletion of one gene that is important for producing
an important receptor that affects her blood pressure, blood glucose levels, and overall metabolic
rate. Which of the following extensions of Mendelian genetics explains this?
a) Incomplete dominance
b) Pleiotropy
c) Epistasis
d) Polygenic inheritance
e) Codominance
,5. Which of the following is an example of codominance?
a) A lizard that changes color when laying in the sun where it is warmer than when it is lying in
the shade
b) A person that is homozygous for type A blood and has a genotype of AA
c) Multiple genes that additively contribute to the hue of the feather color of a bird
d) A bird that exhibits feather colors from both parents
e) A flower that exhibits a petal color that is a blend of both parent petal colors
6. Which of the following cell types undergo the process of crossing over?
a) Blood cells
b) Egg cells
c) Pollen cells
d) Heart cells
e) Both B and C are correct
7. The table below represents the difference in the Cytochrome C gene between various animals
to humans. Use the table to construct a phylogeny consisting of the species listed in the table.
Where should Dog and Gray kangaroo be placed on the tree below, respectively?
Species Number of
differences
Human 0
Rhesus monkey 8
Dog 15
Horse 25
Gray kangaroo 38
Lamprey 125
a) 3 and 5
b) 4 and 6
c) 4 and 2
d) 1 and 3
e) 3 and 6
8. A purebred dog breeder often times chooses to breed two dogs together that have very similar
characteristics in order to create offspring that best reflect the common characteristics unique to
that breed. What effect does this have on the population?
, a) It increases the allele frequency of the common trait
b) It decreases the allele frequency of the common trait
c) It increases the frequency of heterozygotes
d) It decreases the frequency of heterozygotes
e) It has no effect on the population
9. Which of the following evolutionary forces most likely lead to a decrease in genetic variability
within a population?
a) Genetic drift
b) Mutation
c) Migration
d) Selection
e) Recombination
10. Which of the following is true of disruptive selection?
a) It results from an environmental change that shifts the mean in one direction
b) It results when one version of a trait works best for the species
c) It results from selection for both extreme versions of the trait
d) It results from stabilization of the population variation around the best version of the trait
e) It results from the increased fitness of the heterozygote
11. In Swiss starlings, genotypes that lead to a clutch size (the number of eggs a bird lays) of 5
usually have more surviving young than birds who lay too few or too many eggs. This is an
example of ...
a) disruptive selection
b) sexual selection
c) stabilizing selection
d) directional selection
e) incomplete dominant selection
12. You are on a research expedition to study the majestic peacocks in India. You observe from a
distance a female peacock choosing a male peacock with brightly colored plumage with long
tails as her mate. You also notice that there are quite a few birds with a brightly colored plumage
and large tails in the vicinity. From BIO200 you know that the long tails of the male peacocks is
indicative of…
