UMKC BIO 108 EXAM 4 STUDY GUIDE
QUESTIONS AND ANSWERS GRADED A+
2026
What is the most important missing evidence or observation in Darwin's theory of evolution
when proposed in 1859? - ANS An understanding of inheritance and the source of genetic
variation.
Which of the following statements about the biological species concept is incorrect? -
ANS Biological species concept is the model used for grouping extinct forms of life.
If allele frequencies in a population are changing due to chance or random events, what is
happening? - ANS genetic drift
A grouping of species in which a common ancestral species is missing is _____. -
ANS polyphyletic
Structures as different as human arms, bat wings, and dolphin flippers contain many of the
same bones, these bones having developed from common ancestry. What do biologists call
these features? - ANS homologous structures
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
1
, What type of reproductive isolating barrier is observed if a hybrid is vigorous, but sterile? -
ANS reduced hybrid fertility
When an individual organism is said to have a greater fitness than another individual, this
specifically means that the organism _________. - ANS leaves more viable offspring than
others of its species
Shared derived characters are most likely to be found in taxa that are _______. -
ANS monophyletic
What type of evolution is observed if similarity is observed between two species that is due to
homology and not analogy? - ANS divergent evolution
What type of reproductive isolating barrier is observed if organisms breed based on behaviors
that are unique to its species? - ANS behavioral isolation
Which of the following is a condition that will prevent a population from being in a Hardy-
Weinberg equilibrium? - ANS natural selection
Place the taxa below in order from most specific to least specific. - ANS species, genus,
family, order, class, phylum, kingdom
Which statement about natural selection is most correct? - ANS Well-adapted individuals
leave more offspring, and thus contribute more to the next generation's gene pool, than do
poorly adapted individuals.
A mode of speciation in which gene flow between populations is prevented by a geographic
barrier. - ANS allopatric speciation
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
2
QUESTIONS AND ANSWERS GRADED A+
2026
What is the most important missing evidence or observation in Darwin's theory of evolution
when proposed in 1859? - ANS An understanding of inheritance and the source of genetic
variation.
Which of the following statements about the biological species concept is incorrect? -
ANS Biological species concept is the model used for grouping extinct forms of life.
If allele frequencies in a population are changing due to chance or random events, what is
happening? - ANS genetic drift
A grouping of species in which a common ancestral species is missing is _____. -
ANS polyphyletic
Structures as different as human arms, bat wings, and dolphin flippers contain many of the
same bones, these bones having developed from common ancestry. What do biologists call
these features? - ANS homologous structures
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
1
, What type of reproductive isolating barrier is observed if a hybrid is vigorous, but sterile? -
ANS reduced hybrid fertility
When an individual organism is said to have a greater fitness than another individual, this
specifically means that the organism _________. - ANS leaves more viable offspring than
others of its species
Shared derived characters are most likely to be found in taxa that are _______. -
ANS monophyletic
What type of evolution is observed if similarity is observed between two species that is due to
homology and not analogy? - ANS divergent evolution
What type of reproductive isolating barrier is observed if organisms breed based on behaviors
that are unique to its species? - ANS behavioral isolation
Which of the following is a condition that will prevent a population from being in a Hardy-
Weinberg equilibrium? - ANS natural selection
Place the taxa below in order from most specific to least specific. - ANS species, genus,
family, order, class, phylum, kingdom
Which statement about natural selection is most correct? - ANS Well-adapted individuals
leave more offspring, and thus contribute more to the next generation's gene pool, than do
poorly adapted individuals.
A mode of speciation in which gene flow between populations is prevented by a geographic
barrier. - ANS allopatric speciation
@COPYRIGHT 2026/2027 ALL RIGHTS RESERVED
2
