RNA retroviruses contain reverse transcriptase, allowing them to circumvent the
"central dogma" of molecular biology. Choose the most appropriate description of
reverse transcriptase.
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It transcribes RNA to make DNA
Viruses are not always considered to be life forms because they
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are not organized in cells, but need to use a host organism cell to survive
and reproduce.
,Adaptations which serve to prevent accidental hybridization between species
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prezygotic barriers
If there are only two alleles at a given locus and the frequency of one allele is 0.3,
what is the frequency of the other allele?
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0.7
A proficient engineer can easily design skeletal structures that are more functional
than those currently found in the forelimbs of such diverse mammals as horses,
whales, and bats. That the actual forelimbs of these mammals do not seem to be
optimally arranged is because
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natural selection is generally limited to modifying structures that were
present in previous generations and in previous species
Which term means the same thing as convergent evolution?
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, analogy
All tetrapods are vertebrates (and so are their fishy ancestors). Amphibians, reptiles,
and mammals are tetrapods (which means they have four limbs, or at least their
ancestors did). Mammals are the only tetrapod clade with hair. Birds are the only
tetrapod clade with feathers. Anurans (frogs and toads) are the only amphibian clade
without tails. Lack of a tail in frogs and toads would be considered a
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shared derived character
In most eukaryotes, this type of diversity is maintained by diploidy.
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genetic variation (or variance)
Guppies exhibit sexual dimorphism in some pools due to intersexual selection, but the
frequency of brightly colored males in a population varies depending on
environmental factors such as the presence or absence of predators in the pool.
Which of the following would you predict would evolve in guppies that are taken from
streams in Trinidad with predators and put into streams lacking predators?
Give this one a try later!
Future generations will contain relatively more colorful male guppies.
"central dogma" of molecular biology. Choose the most appropriate description of
reverse transcriptase.
Give this one a try later!
It transcribes RNA to make DNA
Viruses are not always considered to be life forms because they
Give this one a try later!
are not organized in cells, but need to use a host organism cell to survive
and reproduce.
,Adaptations which serve to prevent accidental hybridization between species
Give this one a try later!
prezygotic barriers
If there are only two alleles at a given locus and the frequency of one allele is 0.3,
what is the frequency of the other allele?
Give this one a try later!
0.7
A proficient engineer can easily design skeletal structures that are more functional
than those currently found in the forelimbs of such diverse mammals as horses,
whales, and bats. That the actual forelimbs of these mammals do not seem to be
optimally arranged is because
Give this one a try later!
natural selection is generally limited to modifying structures that were
present in previous generations and in previous species
Which term means the same thing as convergent evolution?
Give this one a try later!
, analogy
All tetrapods are vertebrates (and so are their fishy ancestors). Amphibians, reptiles,
and mammals are tetrapods (which means they have four limbs, or at least their
ancestors did). Mammals are the only tetrapod clade with hair. Birds are the only
tetrapod clade with feathers. Anurans (frogs and toads) are the only amphibian clade
without tails. Lack of a tail in frogs and toads would be considered a
Give this one a try later!
shared derived character
In most eukaryotes, this type of diversity is maintained by diploidy.
Give this one a try later!
genetic variation (or variance)
Guppies exhibit sexual dimorphism in some pools due to intersexual selection, but the
frequency of brightly colored males in a population varies depending on
environmental factors such as the presence or absence of predators in the pool.
Which of the following would you predict would evolve in guppies that are taken from
streams in Trinidad with predators and put into streams lacking predators?
Give this one a try later!
Future generations will contain relatively more colorful male guppies.
