WGU C190 Intro to Biology Macroevolution Exam
29 Questions with Verified Answers
Microevolution is to population as macroevolution is to __________. - CORRECT
ANSWER Species
Microevolution is the process by which populations evolve over a relatively short
amount of time (a few to several generations). Macroevolution is the process by
which lineages (species) or groups of populations evolve over relatively long
amounts of time (hundreds to thousands of generations or more). The changes
that occur in a population as a result of microevolution can be passed on to the
other populations within the lineage due to gene flow, and in time, may lead to
macroevolution. - CORRECT ANSWER How are the processes of microevolution
and macroevolution related to each other?
The apple- and hawthorn-breeding flies are beginning to diverge into distinct
species. - CORRECT ANSWER Consider the apple-breeding and hawthorn-breeding
flies.
Is this an example of speciation?
We cannot say that speciation is complete, but evidence indicates that it may
happen over time as the flies continue to specialize on different host plants. -
CORRECT ANSWER Scientists have found that apple-breeding and hawthorn-
breeding flies can mate and produce fertile offspring. However, they rarely do so
under natural conditions. What does this say about speciation in this case?
N. parvulus on Santa Cruz - Populations that were close together in space had
more similar genetics. This is a result of continuing migration and gene flow
, between neighboring populations. - CORRECT ANSWER Recently scientists have
compared the genetics of several different mockingbird populations representing
all four species throughout the Galapagos Islands. For example, they compared
the genes of a population of N. parvulus on Baltra to those of all the other
populations in their sample. Where do you think they found the closest match?
Speciation event - Two new species arose from this point. - CORRECT ANSWER
What event occurred at the circle?
A change in a biological lineage including the origin or extinction of species. This is
evolution beyond the species level. - CORRECT ANSWER Macroevolution
B: The node at B represents the most recent common ancestor of these two
species. - CORRECT ANSWER If you were tracing back to the most recent common
ancestor of N. trifasciatus and N. macdonaldi, what point would you pick?
N. macdonaldi and N. melanotis: The species with the most recent common
ancestor are most closely related. - CORRECT ANSWER Which two species of
mockingbird are most closely related?
Homologous features indicate relatedness or shared ancestry among species:
When comparing species, homologous features are the details that were inherited
by both species from a common ancestor that had the same feature. They are
telltale signs of ancestry. - CORRECT ANSWER What is the significance of
homologous features?
Similarity of genes and body structures: you share a widow's peak and very similar
DNA: These features are inherited and reflect ancestry. - CORRECT ANSWER Which
29 Questions with Verified Answers
Microevolution is to population as macroevolution is to __________. - CORRECT
ANSWER Species
Microevolution is the process by which populations evolve over a relatively short
amount of time (a few to several generations). Macroevolution is the process by
which lineages (species) or groups of populations evolve over relatively long
amounts of time (hundreds to thousands of generations or more). The changes
that occur in a population as a result of microevolution can be passed on to the
other populations within the lineage due to gene flow, and in time, may lead to
macroevolution. - CORRECT ANSWER How are the processes of microevolution
and macroevolution related to each other?
The apple- and hawthorn-breeding flies are beginning to diverge into distinct
species. - CORRECT ANSWER Consider the apple-breeding and hawthorn-breeding
flies.
Is this an example of speciation?
We cannot say that speciation is complete, but evidence indicates that it may
happen over time as the flies continue to specialize on different host plants. -
CORRECT ANSWER Scientists have found that apple-breeding and hawthorn-
breeding flies can mate and produce fertile offspring. However, they rarely do so
under natural conditions. What does this say about speciation in this case?
N. parvulus on Santa Cruz - Populations that were close together in space had
more similar genetics. This is a result of continuing migration and gene flow
, between neighboring populations. - CORRECT ANSWER Recently scientists have
compared the genetics of several different mockingbird populations representing
all four species throughout the Galapagos Islands. For example, they compared
the genes of a population of N. parvulus on Baltra to those of all the other
populations in their sample. Where do you think they found the closest match?
Speciation event - Two new species arose from this point. - CORRECT ANSWER
What event occurred at the circle?
A change in a biological lineage including the origin or extinction of species. This is
evolution beyond the species level. - CORRECT ANSWER Macroevolution
B: The node at B represents the most recent common ancestor of these two
species. - CORRECT ANSWER If you were tracing back to the most recent common
ancestor of N. trifasciatus and N. macdonaldi, what point would you pick?
N. macdonaldi and N. melanotis: The species with the most recent common
ancestor are most closely related. - CORRECT ANSWER Which two species of
mockingbird are most closely related?
Homologous features indicate relatedness or shared ancestry among species:
When comparing species, homologous features are the details that were inherited
by both species from a common ancestor that had the same feature. They are
telltale signs of ancestry. - CORRECT ANSWER What is the significance of
homologous features?
Similarity of genes and body structures: you share a widow's peak and very similar
DNA: These features are inherited and reflect ancestry. - CORRECT ANSWER Which
