BIOL 1407 Lecture Exam #1 Question Bank Questions With
Complete Solutions
_______ is the ultimate source of genetic variation. Correct
Answers Mutation.
________ selection is a form of sexual selection based on same-
sex competition usually involving males, in which winner
"gains" a mating partner. Correct Answers Intrasexual.
_________ evolution happens when two species from different
lineages independently evolve similar characteristics because
they occupy similar environments. Correct Answers
Convergent.
_________ is the state of a cell or organism having more than
two paired sets of chromosomes. Correct Answers Polyploidy.
_________ isolation is another term for environmental isolation.
Correct Answers Ecological.
_________ selection favors individuals with intermediate
phenotypes and selects against individuals with extreme
phenotypes. Correct Answers Stabilizing.
_________ selection is a type of natural selection in which
competition for mates drives the evolution of certain traits.
Correct Answers Sexual
__________ selection favors individuals at one extreme of a
phenotypic range. Those individuals usually have greater
,reproductive success in a particular environment. Correct
Answers Directional.
___________ and ________ __________ are two ends of the
continuum of the pace of evolutionary change. Correct Answers
Gradualism; punctuated equilibrium
A deer's antlers, a ram's horns and the bring plumage of a male
paradise bird are all examples of which of the following?
Correct Answers Secondary sexual characteristics.
A long period of little or no evolutionary change in a species is
known as: Correct Answers Stasis.
A seemingly important complex structure can evolve by natural
selection because: Correct Answers As natural selection acts to
modify a complex system, the system is functional at each
evolutionary stage.
A seemingly irreducible complex structure can evolve by natural
selection because: Correct Answers As natural selection acts to
modify a complex system, the system is functional at each
evolutionary stage.
A type of sexual selection in which members of one sex, usually
females, choose mates based on particular characteristics such as
courtship songs is called: Correct Answers Intersexual
selection.
, According to the __________ species concept, species are
distinguished by whether gene flow occurs between populations.
Correct Answers Biological.
Although the biological species concept can be useful when
distinguishing among species, it is not as effective when
pertaining to organisms that commonly undergo ________ with
other species and produce viable offspring. Correct Answers
Hybridization/Mating
As a result of convergent evolution, many marsupial mammals
of Australia look similar to _________ mammals found
elsewhere and occupy a similar ecological niche. Correct
Answers Placental.
As a result of epistasis, the selective advantage of an allele:
Correct Answers Would vary from one genotype to another.
Assortive mating changes ________ frequencies but does not
change _________ frequencies. Correct Answers Genotype;
allele
B-Catenin, Bmp4, Ptchl, and Lbh are genes that determine the
size and shape of the cichlid: Correct Answers Jaw.
By favoring different phenotypes at different times, oscillating
selection acts in which way? Correct Answers It maintains
genetic variation in a population.
Complete Solutions
_______ is the ultimate source of genetic variation. Correct
Answers Mutation.
________ selection is a form of sexual selection based on same-
sex competition usually involving males, in which winner
"gains" a mating partner. Correct Answers Intrasexual.
_________ evolution happens when two species from different
lineages independently evolve similar characteristics because
they occupy similar environments. Correct Answers
Convergent.
_________ is the state of a cell or organism having more than
two paired sets of chromosomes. Correct Answers Polyploidy.
_________ isolation is another term for environmental isolation.
Correct Answers Ecological.
_________ selection favors individuals with intermediate
phenotypes and selects against individuals with extreme
phenotypes. Correct Answers Stabilizing.
_________ selection is a type of natural selection in which
competition for mates drives the evolution of certain traits.
Correct Answers Sexual
__________ selection favors individuals at one extreme of a
phenotypic range. Those individuals usually have greater
,reproductive success in a particular environment. Correct
Answers Directional.
___________ and ________ __________ are two ends of the
continuum of the pace of evolutionary change. Correct Answers
Gradualism; punctuated equilibrium
A deer's antlers, a ram's horns and the bring plumage of a male
paradise bird are all examples of which of the following?
Correct Answers Secondary sexual characteristics.
A long period of little or no evolutionary change in a species is
known as: Correct Answers Stasis.
A seemingly important complex structure can evolve by natural
selection because: Correct Answers As natural selection acts to
modify a complex system, the system is functional at each
evolutionary stage.
A seemingly irreducible complex structure can evolve by natural
selection because: Correct Answers As natural selection acts to
modify a complex system, the system is functional at each
evolutionary stage.
A type of sexual selection in which members of one sex, usually
females, choose mates based on particular characteristics such as
courtship songs is called: Correct Answers Intersexual
selection.
, According to the __________ species concept, species are
distinguished by whether gene flow occurs between populations.
Correct Answers Biological.
Although the biological species concept can be useful when
distinguishing among species, it is not as effective when
pertaining to organisms that commonly undergo ________ with
other species and produce viable offspring. Correct Answers
Hybridization/Mating
As a result of convergent evolution, many marsupial mammals
of Australia look similar to _________ mammals found
elsewhere and occupy a similar ecological niche. Correct
Answers Placental.
As a result of epistasis, the selective advantage of an allele:
Correct Answers Would vary from one genotype to another.
Assortive mating changes ________ frequencies but does not
change _________ frequencies. Correct Answers Genotype;
allele
B-Catenin, Bmp4, Ptchl, and Lbh are genes that determine the
size and shape of the cichlid: Correct Answers Jaw.
By favoring different phenotypes at different times, oscillating
selection acts in which way? Correct Answers It maintains
genetic variation in a population.
