BIOL 101/ BIOL101 Module 4 Exam: (Latest
2026/ 2027 Update) Essential Biology I
W/Lab | 100% Verified Questions & correct
Answers | Grade A
The fact that DNA sequences are more similar in more closely related organisms is evidence of
what?
descent with modification
can occur through errors in meiosis that form gametes with extra chromosomes, called
polyploidy.
Sympatric speciation
When individuals leave or join the population, allele frequencies can change as a result of .
gene flow
The wings of bats and insects are called structures; they are similar in function and
appearance, but do not share an origin in a common ancestor.
analogous
introduce new alleles into a population.
Mutations
A mutation can have one of three outcomes on the organisms' appearance (or )
, BIOL 101/ BIOL101 Module 4 Exam: (Latest
2026/ 2027 Update) Essential Biology I
W/Lab | 100% Verified Questions & correct
Answers | Grade A
phenotype
- a formation of a new species
speciation
These unused structures without function are called structures.
vestigial
stems from the chance occurrence that some individuals have more offspring than others
and results in changes in allele frequencies that are random in direction.
Genetic Drift
Speciation occurs along two main pathways: geographic separation ( ) and through
mechanisms that occur within a shared habitat (sympatric speciation).
allopatric speciation
- a magnification of genetic drift in a small population that migrates away from a large
parent population carrying with it an unrepresentative set of alleles
founder effect
, BIOL 101/ BIOL101 Module 4 Exam: (Latest
2026/ 2027 Update) Essential Biology I
W/Lab | 100% Verified Questions & correct
Answers | Grade A
For example, there is a rich that shows the evolutionary transitions from horse ancestors to
modern horses that document intermediate forms and a gradual adaptation o changing
ecosystems.
fossil record
Natural selection can only take place if there is , or differences, among individuals in a
population.
variation
The wings of a hummingbird and an ostrich are structures, meaning they share similarities
(despite their differences resulting from evolutionary divergence).
homologous
- an allopatric speciation that occurs when something in the environment separates
organisms of the same species into separate groups
vicariance
Which situation would most likely lead to allopatric speciation?
A flood causes the formation of a new lake
2026/ 2027 Update) Essential Biology I
W/Lab | 100% Verified Questions & correct
Answers | Grade A
The fact that DNA sequences are more similar in more closely related organisms is evidence of
what?
descent with modification
can occur through errors in meiosis that form gametes with extra chromosomes, called
polyploidy.
Sympatric speciation
When individuals leave or join the population, allele frequencies can change as a result of .
gene flow
The wings of bats and insects are called structures; they are similar in function and
appearance, but do not share an origin in a common ancestor.
analogous
introduce new alleles into a population.
Mutations
A mutation can have one of three outcomes on the organisms' appearance (or )
, BIOL 101/ BIOL101 Module 4 Exam: (Latest
2026/ 2027 Update) Essential Biology I
W/Lab | 100% Verified Questions & correct
Answers | Grade A
phenotype
- a formation of a new species
speciation
These unused structures without function are called structures.
vestigial
stems from the chance occurrence that some individuals have more offspring than others
and results in changes in allele frequencies that are random in direction.
Genetic Drift
Speciation occurs along two main pathways: geographic separation ( ) and through
mechanisms that occur within a shared habitat (sympatric speciation).
allopatric speciation
- a magnification of genetic drift in a small population that migrates away from a large
parent population carrying with it an unrepresentative set of alleles
founder effect
, BIOL 101/ BIOL101 Module 4 Exam: (Latest
2026/ 2027 Update) Essential Biology I
W/Lab | 100% Verified Questions & correct
Answers | Grade A
For example, there is a rich that shows the evolutionary transitions from horse ancestors to
modern horses that document intermediate forms and a gradual adaptation o changing
ecosystems.
fossil record
Natural selection can only take place if there is , or differences, among individuals in a
population.
variation
The wings of a hummingbird and an ostrich are structures, meaning they share similarities
(despite their differences resulting from evolutionary divergence).
homologous
- an allopatric speciation that occurs when something in the environment separates
organisms of the same species into separate groups
vicariance
Which situation would most likely lead to allopatric speciation?
A flood causes the formation of a new lake
