BSC 1011 EXAM #1 QUESTIONS WITH VERIFIED ANSWERS
93
00
1 of 93
Definition
mammalian lower jaw bones and teeth changed gradually over time
Give this one a try later!
Which of the following characteristics were most likely present in the first animals
that colonized land?
A. ability to resist dehydration and presence of a spine
B. ability to resist dehydration and support themselves on four limbs
C. ability to resist dehydration and eat producers
D. ability to eat producers and support themselves on four limbs
Which of the following statements concerning the evolutionary origin of
mammals is most likely true?
A. Radiometric dating using carbon-14 shows that synapsids existed 300
million
years ago.
, B. The origin of mammals cannot be known because the fossil record is
incomplete.
C. Mammalian lower jaw bones and teeth changed gradually over time.
D. Modern mammals and reptiles are descendants of synapsids.
Which of the following statements correctly describes paralogous genes in related
species?
A. homology of the genes is a result of gene duplication
B. homology of the genes is a result of a speciation event
C. homology of the genes is due to mutation
D. homology of the genes is based on the rate at which they evolve
Which of the following statements is accurate with regard to a phylogeny, as
represented by a phylogenetic tree?
A. Members of the same clade likely share many derived characters.
B. A monophyletic group can be properly based on convergent features.
C. The ancestral group often has all the derived characters of the descendant
species.
D. Shared ancestral characters are excellent traits to use in developing a phylogeny.
Don't know?
2 of 93
Definition
many genes are acted upon by natural selection
Give this one a try later!
, Which of the following statements describes a potential drawback for using
molecular clocks to measure evolutionary time?
A. different genes evolve at different rates
B. all mutations of DNA have a functional effect
C. paralogous genes evolve disproportionately with time
WhichDo. m f tahneyfo
glelo
nwesinagrechaacrta
ecdteurpisotn
icsbywn
earetum
raolsstelliek cetlyiopn resent in the first animals
that colonized land?
A. ability to resist dehydration and presence of a spine
B. ability to resist dehydration and support themselves on four limbs
C. ability to resist dehydration and eat producers
D. ability to eat producers and support themselves on four limbs
Which of the following statements concerning the evolutionary origin of mammals is
most likely true?
A. Radiometric dating using carbon-14 shows that synapsids existed 300 million
years ago.
B. The origin of mammals cannot be known because the fossil record is
incomplete.
C. Mammalian lower jaw bones and teeth changed gradually over time.
D. Modern mammals and reptiles are descendants of synapsids.
Which of the following methods is the most accurate way to measure the age of a
relatively recent fossil?
-ratio of carbon-14 to carbon-12
-sequences of fossils in rock strata
-ratio of plutonium-244 to uranium 240
-ratio of uranium-238 to thorium-234
Don't know?
3 of 93
Term
, Which of the following did all protocells have in common?
-the ability to synthesize enzymes
-a surrounding membrane or membrane-like structure
-RNA genes
-the ability to replicate RNA
Give this one a try later!
the presence of only D-isomers of surrounding membrane or
amino acids membrane like structures
many genes are acted upon by changes in the regulatory sequences
natural selection of the Pitx1 gene
Don't know?
4 of 93
Term
Animals that possess homologous structures probably ___ _.
A. evolved from a common ancestor
B. are headed for extinction
C. by chance had similar mutations in the past
D. are not related
E. have increased genetic diversity
Give this one a try later!
93
00
1 of 93
Definition
mammalian lower jaw bones and teeth changed gradually over time
Give this one a try later!
Which of the following characteristics were most likely present in the first animals
that colonized land?
A. ability to resist dehydration and presence of a spine
B. ability to resist dehydration and support themselves on four limbs
C. ability to resist dehydration and eat producers
D. ability to eat producers and support themselves on four limbs
Which of the following statements concerning the evolutionary origin of
mammals is most likely true?
A. Radiometric dating using carbon-14 shows that synapsids existed 300
million
years ago.
, B. The origin of mammals cannot be known because the fossil record is
incomplete.
C. Mammalian lower jaw bones and teeth changed gradually over time.
D. Modern mammals and reptiles are descendants of synapsids.
Which of the following statements correctly describes paralogous genes in related
species?
A. homology of the genes is a result of gene duplication
B. homology of the genes is a result of a speciation event
C. homology of the genes is due to mutation
D. homology of the genes is based on the rate at which they evolve
Which of the following statements is accurate with regard to a phylogeny, as
represented by a phylogenetic tree?
A. Members of the same clade likely share many derived characters.
B. A monophyletic group can be properly based on convergent features.
C. The ancestral group often has all the derived characters of the descendant
species.
D. Shared ancestral characters are excellent traits to use in developing a phylogeny.
Don't know?
2 of 93
Definition
many genes are acted upon by natural selection
Give this one a try later!
, Which of the following statements describes a potential drawback for using
molecular clocks to measure evolutionary time?
A. different genes evolve at different rates
B. all mutations of DNA have a functional effect
C. paralogous genes evolve disproportionately with time
WhichDo. m f tahneyfo
glelo
nwesinagrechaacrta
ecdteurpisotn
icsbywn
earetum
raolsstelliek cetlyiopn resent in the first animals
that colonized land?
A. ability to resist dehydration and presence of a spine
B. ability to resist dehydration and support themselves on four limbs
C. ability to resist dehydration and eat producers
D. ability to eat producers and support themselves on four limbs
Which of the following statements concerning the evolutionary origin of mammals is
most likely true?
A. Radiometric dating using carbon-14 shows that synapsids existed 300 million
years ago.
B. The origin of mammals cannot be known because the fossil record is
incomplete.
C. Mammalian lower jaw bones and teeth changed gradually over time.
D. Modern mammals and reptiles are descendants of synapsids.
Which of the following methods is the most accurate way to measure the age of a
relatively recent fossil?
-ratio of carbon-14 to carbon-12
-sequences of fossils in rock strata
-ratio of plutonium-244 to uranium 240
-ratio of uranium-238 to thorium-234
Don't know?
3 of 93
Term
, Which of the following did all protocells have in common?
-the ability to synthesize enzymes
-a surrounding membrane or membrane-like structure
-RNA genes
-the ability to replicate RNA
Give this one a try later!
the presence of only D-isomers of surrounding membrane or
amino acids membrane like structures
many genes are acted upon by changes in the regulatory sequences
natural selection of the Pitx1 gene
Don't know?
4 of 93
Term
Animals that possess homologous structures probably ___ _.
A. evolved from a common ancestor
B. are headed for extinction
C. by chance had similar mutations in the past
D. are not related
E. have increased genetic diversity
Give this one a try later!
