UMKC Bio 108 Exam 4 Study Guide Questions With
Complete Solutions
A grouping of species in which a common ancestral species is
missing is _____. Correct Answer polyphyletic
A mode of speciation in which gene flow between populations is
prevented by a geographic barrier. Correct Answer allopatric
speciation
According to punctuated equilibrium, changes in shape and form
occurs ______. Correct Answer rapidly when species first
arise, then remains static
Agricultural companies occasionally create plants for
commercialization in which the seeds are not able to be used for
successive generations because they do not produce seedlings.
This type of reproductive barrier is called ________. Correct
Answer reduced hybrid fertility
An investigator is trying to determine the homology between
four different species and generates a phylogenetic tree. Other
reports had grouped these species in different ways. These
groupings are indicated by dashed lines superimposed on the
recent phylogenetic tree.
1.)Which of these groups indicated by dashed lines is
paraphyletic?
2.)Which of these groups indicated by dashed lines is most
consistent with homology based on shared common ancestry?
Correct Answer 1.)Clade B
, 2.)Clade A
Animals that possess homologous structures probably _____.
Correct Answer evolved from the same ancestor
Based on the phylogenetic tree presented here, which of the
following is an accurate statement of relationships? Correct
Answer A salamander is equally related to a lizard and a snake.
Based on this information, population 1 allele frequencies are
experiencing genetic drift, likely caused by a ______ . Correct
Answer founder effect
Based on this information, population 2 is experiencing genetic
drift likely caused by __________. Correct Answer bottleneck
effect
C. Darwin was not the first to state that evolution occurs. His
contribution was providing a theory that provides a mechanism
for evolution, which he called natural selection. According to
Darwin, which of the following events will be the first to occur
when a population evolves via natural selection. Correct
Answer A new selective pressure arises.
Degradation of mRNAs can be facilitated by
________________. Correct Answer RNA interference by
single-stranded miRNAs
Dioxin, produced as a by-product of various industrial chemical
processes, is suspected of causing cancer and birth defects in
animals and humans. It apparently acts by entering cells and
Complete Solutions
A grouping of species in which a common ancestral species is
missing is _____. Correct Answer polyphyletic
A mode of speciation in which gene flow between populations is
prevented by a geographic barrier. Correct Answer allopatric
speciation
According to punctuated equilibrium, changes in shape and form
occurs ______. Correct Answer rapidly when species first
arise, then remains static
Agricultural companies occasionally create plants for
commercialization in which the seeds are not able to be used for
successive generations because they do not produce seedlings.
This type of reproductive barrier is called ________. Correct
Answer reduced hybrid fertility
An investigator is trying to determine the homology between
four different species and generates a phylogenetic tree. Other
reports had grouped these species in different ways. These
groupings are indicated by dashed lines superimposed on the
recent phylogenetic tree.
1.)Which of these groups indicated by dashed lines is
paraphyletic?
2.)Which of these groups indicated by dashed lines is most
consistent with homology based on shared common ancestry?
Correct Answer 1.)Clade B
, 2.)Clade A
Animals that possess homologous structures probably _____.
Correct Answer evolved from the same ancestor
Based on the phylogenetic tree presented here, which of the
following is an accurate statement of relationships? Correct
Answer A salamander is equally related to a lizard and a snake.
Based on this information, population 1 allele frequencies are
experiencing genetic drift, likely caused by a ______ . Correct
Answer founder effect
Based on this information, population 2 is experiencing genetic
drift likely caused by __________. Correct Answer bottleneck
effect
C. Darwin was not the first to state that evolution occurs. His
contribution was providing a theory that provides a mechanism
for evolution, which he called natural selection. According to
Darwin, which of the following events will be the first to occur
when a population evolves via natural selection. Correct
Answer A new selective pressure arises.
Degradation of mRNAs can be facilitated by
________________. Correct Answer RNA interference by
single-stranded miRNAs
Dioxin, produced as a by-product of various industrial chemical
processes, is suspected of causing cancer and birth defects in
animals and humans. It apparently acts by entering cells and
