Biology 1B Final Exam Questions &
Answers (Grade A+)
(Texas Tech)
_____ structures share a common ancestry, but not necessarily a
common function, while _____ structures share a common function
but do not share a common ancestry. -
correct answer ✅Homologous; analogous
A black guinea pig and a white guinea pig mate and have offspring.
All the offspring are black. Is the trait of coat color probably a
single-gene trait or a polygenic trait? Choose the best explanation. -
correct answer ✅It is a single-gene trait, because there are only
two coat colors possible.
A derived character is a trait that -
correct answer ✅arose in the most recent common ancestor of a
particular lineage and passed to its descendants.
A population of lizards is separated from another population of
lizards by a wide river. This separation is called -
correct answer ✅geographic isolation.
A random change in allele frequency that occurs in small
populations due to chance occurrences is called -
correct answer ✅genetic drift.
,Biology 1B Final Exam Questions &
Answers (Grade A+)
(Texas Tech)
A trait controlled by a single gene typically has _____ phenotypes,
while a trait controlled by two or more genes typically has _____
phenotypes. -
correct answer ✅few; many
According to Lamarck, the long neck of a giraffe would be
considered a(n) -
correct answer ✅acquired characteristic.
According to Malthus, what factor limits human population
growth? -
correct answer ✅All of the above.
All of the following are domains of life except -
correct answer ✅Protista.
All species--living and extinct--are united by descent from ancient
common ancestors and exhibit diversity due to natural selection
and adaptation, according to the principle of -
correct answer ✅common descent.
,Biology 1B Final Exam Questions &
Answers (Grade A+)
(Texas Tech)
Along any one lineage, what do the locations of derived characters
on a cladogram show? -
correct answer ✅the evolutionary order in which the
characteristics arose in that lineage
American vultures used to be classified in the same family as
African vultures. Which discovery caused scientists to reclassify
American vultures as more closely related to storks? -
correct answer ✅DNA evidence indicated that American vultures
share more common sequences with storks.
At the molecular level, overwhelming similarities in the _____ of all
organisms, along with clearly homologous molecules, provide
evidence of common descent. -
correct answer ✅genetic code
Because they are made up of similar bones, the flippers of whales
and the wings of birds are examples of -
correct answer ✅homologous structures.
, Biology 1B Final Exam Questions &
Answers (Grade A+)
(Texas Tech)
By hunting at different times of day, hawks and owls are able to
reduce -
correct answer ✅competition.
Considering evolutionary mechanisms, including genetic drift, how
can the founder effect lead to changes in the gene pool? -
correct answer ✅The founder effect results in a gene pool with
different allele frequencies.
Darwin found fossils of many organisms that did not resemble any
living species. How might this finding have affected his
understanding of life's diversity? -
correct answer ✅It may have led him to the understanding that
organisms do not truly become extinct, but rather they simply
evolve into different species.
Darwin used artificial selection to breed what animals at his home?
-
correct answer ✅pigeons
During the voyage of the Beagle, what were the three kinds of
variations among organisms that Darwin observed? -
Answers (Grade A+)
(Texas Tech)
_____ structures share a common ancestry, but not necessarily a
common function, while _____ structures share a common function
but do not share a common ancestry. -
correct answer ✅Homologous; analogous
A black guinea pig and a white guinea pig mate and have offspring.
All the offspring are black. Is the trait of coat color probably a
single-gene trait or a polygenic trait? Choose the best explanation. -
correct answer ✅It is a single-gene trait, because there are only
two coat colors possible.
A derived character is a trait that -
correct answer ✅arose in the most recent common ancestor of a
particular lineage and passed to its descendants.
A population of lizards is separated from another population of
lizards by a wide river. This separation is called -
correct answer ✅geographic isolation.
A random change in allele frequency that occurs in small
populations due to chance occurrences is called -
correct answer ✅genetic drift.
,Biology 1B Final Exam Questions &
Answers (Grade A+)
(Texas Tech)
A trait controlled by a single gene typically has _____ phenotypes,
while a trait controlled by two or more genes typically has _____
phenotypes. -
correct answer ✅few; many
According to Lamarck, the long neck of a giraffe would be
considered a(n) -
correct answer ✅acquired characteristic.
According to Malthus, what factor limits human population
growth? -
correct answer ✅All of the above.
All of the following are domains of life except -
correct answer ✅Protista.
All species--living and extinct--are united by descent from ancient
common ancestors and exhibit diversity due to natural selection
and adaptation, according to the principle of -
correct answer ✅common descent.
,Biology 1B Final Exam Questions &
Answers (Grade A+)
(Texas Tech)
Along any one lineage, what do the locations of derived characters
on a cladogram show? -
correct answer ✅the evolutionary order in which the
characteristics arose in that lineage
American vultures used to be classified in the same family as
African vultures. Which discovery caused scientists to reclassify
American vultures as more closely related to storks? -
correct answer ✅DNA evidence indicated that American vultures
share more common sequences with storks.
At the molecular level, overwhelming similarities in the _____ of all
organisms, along with clearly homologous molecules, provide
evidence of common descent. -
correct answer ✅genetic code
Because they are made up of similar bones, the flippers of whales
and the wings of birds are examples of -
correct answer ✅homologous structures.
, Biology 1B Final Exam Questions &
Answers (Grade A+)
(Texas Tech)
By hunting at different times of day, hawks and owls are able to
reduce -
correct answer ✅competition.
Considering evolutionary mechanisms, including genetic drift, how
can the founder effect lead to changes in the gene pool? -
correct answer ✅The founder effect results in a gene pool with
different allele frequencies.
Darwin found fossils of many organisms that did not resemble any
living species. How might this finding have affected his
understanding of life's diversity? -
correct answer ✅It may have led him to the understanding that
organisms do not truly become extinct, but rather they simply
evolve into different species.
Darwin used artificial selection to breed what animals at his home?
-
correct answer ✅pigeons
During the voyage of the Beagle, what were the three kinds of
variations among organisms that Darwin observed? -
