WGU C190 - Intro to Biology – Macroevolution Exam Solved
Correctly To Score A+ 2026
1. Species Microevolution is to popula-
tion as macroevolution is to
.
2. How are the processes of microevolution and Microevolution is the process
macroevolution related to each other? by which populations evolve
over a relatively short amount
of time (a few to several gen-
erations). Macroevolution is
the process by which lineages
(species) or groups of popula-
tions evolve over relatively long
amounts of time (hundreds to
thousands of generations or
more). The changes that oc-
cur in a population as a re-
sult of microevolution can be
passed on to the other popu-
lations within the lineage due
to gene flow, and in time, may
lead to macroevolution.
3. Consider the apple-breeding and hawthorn-breed- The apple- and
ing flies. hawthorn-breeding flies are
Is this an example of speciation? beginning to diverge into dis-
tinct species.
4. Scientists have found that apple-breeding and We cannot say that specia-
hawthorn-breeding flies can mate and produce fer- tion is complete, but evidence
tile offspring. However, they rarely do so under nat- indicates that it may happen
ural conditions. What does this say about speciation over time as the flies continue
in this case?
1/9
, WGU C190 - Intro to Biology – Macroevolution Exam Solved
Correctly To Score A+ 2026
to specialize on ditterent host
plants.
5. Recently scientists have compared the genetics of N. parvulus on Santa Cruz -
several different mockingbird populations repre- Populations that were close to-
senting all four species throughout the Galapagos gether in space had more sim-
Islands. For example, they compared the genes of ilar genetics. This is a result
a population of N. parvulus on Baltra to those of of continuing migration and
all the other populations in their sample. Where do gene flow between neighbor-
you think they found the closest match? ing populations.
6. What event occurred at the circle? Speciation event - Two new
species arose from this point.
7. Macroevolution A change in a biological lin-
eage including the origin or
extinction of species. This is
evolution beyond the species
level.
8. If you were tracing back to the most recent common B: The node at B represents the
ancestor of N. trifasciatus and N. macdonaldi, what most recent common ancestor
point would you pick? of these two species.
9. Which two species of mockingbird are most closely N. macdonaldi and N. melan-
related? otis: The species with the most
2/9
Correctly To Score A+ 2026
1. Species Microevolution is to popula-
tion as macroevolution is to
.
2. How are the processes of microevolution and Microevolution is the process
macroevolution related to each other? by which populations evolve
over a relatively short amount
of time (a few to several gen-
erations). Macroevolution is
the process by which lineages
(species) or groups of popula-
tions evolve over relatively long
amounts of time (hundreds to
thousands of generations or
more). The changes that oc-
cur in a population as a re-
sult of microevolution can be
passed on to the other popu-
lations within the lineage due
to gene flow, and in time, may
lead to macroevolution.
3. Consider the apple-breeding and hawthorn-breed- The apple- and
ing flies. hawthorn-breeding flies are
Is this an example of speciation? beginning to diverge into dis-
tinct species.
4. Scientists have found that apple-breeding and We cannot say that specia-
hawthorn-breeding flies can mate and produce fer- tion is complete, but evidence
tile offspring. However, they rarely do so under nat- indicates that it may happen
ural conditions. What does this say about speciation over time as the flies continue
in this case?
1/9
, WGU C190 - Intro to Biology – Macroevolution Exam Solved
Correctly To Score A+ 2026
to specialize on ditterent host
plants.
5. Recently scientists have compared the genetics of N. parvulus on Santa Cruz -
several different mockingbird populations repre- Populations that were close to-
senting all four species throughout the Galapagos gether in space had more sim-
Islands. For example, they compared the genes of ilar genetics. This is a result
a population of N. parvulus on Baltra to those of of continuing migration and
all the other populations in their sample. Where do gene flow between neighbor-
you think they found the closest match? ing populations.
6. What event occurred at the circle? Speciation event - Two new
species arose from this point.
7. Macroevolution A change in a biological lin-
eage including the origin or
extinction of species. This is
evolution beyond the species
level.
8. If you were tracing back to the most recent common B: The node at B represents the
ancestor of N. trifasciatus and N. macdonaldi, what most recent common ancestor
point would you pick? of these two species.
9. Which two species of mockingbird are most closely N. macdonaldi and N. melan-
related? otis: The species with the most
2/9
