BIOL 112 EXAM 1 (TAMU TAG)
QUESTIONS AND ALL CORRECT
ANSWERS.
Lamarck's ideas about_____ have been soundly rejected. - Answer How adaptation occurs
Darwin's mechanism for the cause of evolution was based upon... - Answer Characteristics
that enhance survival are heritable
&Existing variation among individuals
What accounts for broad, continuous variation of a particular phenotype within a population. -
Answer Multiple genes
Select the true statement from those listed below.
The evolution of larger genome size is expanded by gene duplication events
When a point mutation occurs in the DNA of reproductive cells, a new allele is always formed
Most phenotypic variation within populations is due to environmental effects
All of the above are TRUE - Answer The evolution of larger genome size is expanded by gene
duplication events
In a population of mice under Hardy-Weinberg conditions, black coat color is completely
dominant to brown coat color. Only 4% of the population have brown coats. What proportion of
the population is heterozygous? - Answer 0.32 = 32%
Natural selection acts directly on the _________ but the fundamental unit of evolution is the
_________. - Answer Individual; population
A large population of birds contains 16% homozygous recessive for small beaks (large beak size
is completely dominant). Assume random mating and H-W equilibrium the next generation will
contain: - Answer 16% birds with small beaks
84% birds with large beaks
In the study of mosquitofish in the Bahamas, body shape in different populations was
influenced by the presence or absence of predators. The fact that the fish preferred to mate
with other fish that had the same body shape was interpreted as evidence for? - Answer The
process of allopatric speciation
, In an example covered in class and in your textbook, a study of soapberry bugs in Florida
showed that populations feeding on fruits of the recently introduced raintrees had a shorter
feeding beaks than the populations feeding on the native balloon vines. Researchers say that
the shorted beaks are a change in the bugs due to natural selection. For this to be evidence of
the process of natural selection, what must be shown to be true? - Answer That the length of
the feeding beak is an inherited feature.
Evolution is a change in a population's _____ frequency over generations. - Answer Allele
Mendel - Answer established the concept of the gene as the unit of heredity
Hutton and Lyell - Answer the great age of the Earth and the long-term action of continuous
gradual processes producing large-scale geologic change
Wallace - Answer independently developed a theory of natural selection; provided incentive
for Darwin to get his work published
Darwin - Answer natural selection as the mechanism by which organisms become adapted to
their environment
Linnaeus - Answer established the binomial system of biological nomenclature
Lamarck - Answer The more a structure is used in an individual, the more developed it
becomes; the character changes acquired during the life of the individual are then passed to
offspring
After several months of treating a bacterial infection in a community with penicillin, all new
infections of that type were penicillin resistant. How can this be? - Answer Some penicillin
resistant bacteria were present at the start of treatment, and their frequency increased due to
natural selection.
Evolution is considered _______ when distantly related organisms develop similar features from
different lineages. - Answer convergent
The smallest biological unit that can evolve are? - Answer Populations
Mole rats are entirely fossorial, they spend their entire lives in underground burrows and
runaways. These animals have no external eye, but have very tiny and functionless eyes under
the skin. It is believed that mole rats are evolved from a terrestrial rodent with typical and
functional mammalian eyes. The eyes of mole rats, therefore, are an example of? - Answer A
vestigial Structure
QUESTIONS AND ALL CORRECT
ANSWERS.
Lamarck's ideas about_____ have been soundly rejected. - Answer How adaptation occurs
Darwin's mechanism for the cause of evolution was based upon... - Answer Characteristics
that enhance survival are heritable
&Existing variation among individuals
What accounts for broad, continuous variation of a particular phenotype within a population. -
Answer Multiple genes
Select the true statement from those listed below.
The evolution of larger genome size is expanded by gene duplication events
When a point mutation occurs in the DNA of reproductive cells, a new allele is always formed
Most phenotypic variation within populations is due to environmental effects
All of the above are TRUE - Answer The evolution of larger genome size is expanded by gene
duplication events
In a population of mice under Hardy-Weinberg conditions, black coat color is completely
dominant to brown coat color. Only 4% of the population have brown coats. What proportion of
the population is heterozygous? - Answer 0.32 = 32%
Natural selection acts directly on the _________ but the fundamental unit of evolution is the
_________. - Answer Individual; population
A large population of birds contains 16% homozygous recessive for small beaks (large beak size
is completely dominant). Assume random mating and H-W equilibrium the next generation will
contain: - Answer 16% birds with small beaks
84% birds with large beaks
In the study of mosquitofish in the Bahamas, body shape in different populations was
influenced by the presence or absence of predators. The fact that the fish preferred to mate
with other fish that had the same body shape was interpreted as evidence for? - Answer The
process of allopatric speciation
, In an example covered in class and in your textbook, a study of soapberry bugs in Florida
showed that populations feeding on fruits of the recently introduced raintrees had a shorter
feeding beaks than the populations feeding on the native balloon vines. Researchers say that
the shorted beaks are a change in the bugs due to natural selection. For this to be evidence of
the process of natural selection, what must be shown to be true? - Answer That the length of
the feeding beak is an inherited feature.
Evolution is a change in a population's _____ frequency over generations. - Answer Allele
Mendel - Answer established the concept of the gene as the unit of heredity
Hutton and Lyell - Answer the great age of the Earth and the long-term action of continuous
gradual processes producing large-scale geologic change
Wallace - Answer independently developed a theory of natural selection; provided incentive
for Darwin to get his work published
Darwin - Answer natural selection as the mechanism by which organisms become adapted to
their environment
Linnaeus - Answer established the binomial system of biological nomenclature
Lamarck - Answer The more a structure is used in an individual, the more developed it
becomes; the character changes acquired during the life of the individual are then passed to
offspring
After several months of treating a bacterial infection in a community with penicillin, all new
infections of that type were penicillin resistant. How can this be? - Answer Some penicillin
resistant bacteria were present at the start of treatment, and their frequency increased due to
natural selection.
Evolution is considered _______ when distantly related organisms develop similar features from
different lineages. - Answer convergent
The smallest biological unit that can evolve are? - Answer Populations
Mole rats are entirely fossorial, they spend their entire lives in underground burrows and
runaways. These animals have no external eye, but have very tiny and functionless eyes under
the skin. It is believed that mole rats are evolved from a terrestrial rodent with typical and
functional mammalian eyes. The eyes of mole rats, therefore, are an example of? - Answer A
vestigial Structure
