BIOLOGY 102 EXAM 1 QUESTIONS
AND ANSWERS LATEST UPDATE 2026
What is adaptation? - ANSWERSBehavioral adaptations, structural adaptations,
Biochemical adaptations, physiological adaptations.
Natural Selection - ANSWERSis a process in which organisms with certain inherited
characteristics are more likely to survive and reproduce than are individuals with other
characteristics.
Population - ANSWERSa group of individuals of the same species living in the same
place at the same time
Evolution - ANSWERSthe genetic composition of a population changes over time.
Natural selection leads to - ANSWERSA population changing over generations, and
evolutionary adaptation.
The Origin of Species challenged.. - ANSWERSThe notion that earth was relatively
young and populated by unrelated species
The Greek philosopher Aristotle held the belief.. - ANSWERSthat species are fixed and
do not evolve.
Two points from the Origin of Species - ANSWERSOrganisms inhabiting Earth today
descended from ancestral species; Natural selection was the mechanism for descent
with modification
Fossils - ANSWERSImprints or remains of organisms that lived in the past, often found
in sedimentary rocks
Fossil record - ANSWERSIs the ordered sequence of fossils as they appear in rock
layers; reveals the appearance of organisms in a historical sequence; fits the molecular
and cellular evidence that prokaryotes are the ancestors of all life
Paleontologists - ANSWERSAre scientists that study fossils
Biogeography - ANSWERSthe study of the geographic distribution of species that first
suggested to Darwin that today's organisms evolved from ancestral forms.
Comparitive Anatomy - ANSWERSIs the comparison of body structure between
different species; confirms that evolution is a remodeling process
, Homology - ANSWERSThe similarity in structures due to common ancestry
Illustrated by the remodeling of the pattern of bones forming the forelimbs of mammals
Vestigial Structures - ANSWERSAre remnants of features that served important
functions in an organism's ancestors; now have only marginal, if any, importance
DNA, and DNA encoded proteins - ANSWERSThe hereditary background of an
organism is documented in
Darwins two observations - ANSWERSAll species tend to produce excessive numbers
of offspring; Organisms vary, and much of this variation is heritable
Modern synthesis - ANSWERSthe fusion of genetics with evolutionary biology.
Gene pool - ANSWERSThe total collection of alleles in a population at any one time
Microevolution - ANSWERSevolution is occurring on its smallest scale
Genetic drift - ANSWERSA change in the gene pool of a small population; due to
chance
The bottleneck effect - ANSWERSIs an example of genetic drift; results from a drastic
reduction in population size
Founder effect - ANSWERSthe genetic drift resulting from the establishment of a small
new population whose gene pool differs from that of the regular parent population
Gene flow - ANSWERSIs genetic exchange with another population; tends to reduce
genetic differences between populations
fitness - ANSWERSthe contribution an individual makes to the gene pool of the next
generation relative to the contributions of other individuals.
Polygenic traits tend to - ANSWERSproduce phenotypes that vary more or less
continuously.
Single gene traits - ANSWERStend to produce only a few distinct phenotypes.
Genetic variation results from - ANSWERSMutations, changes in the DNA of an
organism, sexual recombination, the shuffling of alleles during meiosis
Gene pool - ANSWERSa reservoir from which the next generation draws its genes.
Alleles can be symbolized by - ANSWERSp for the relative frequency of the dominant
allele in the population; and q for the frequency of the recessive allele in the population
AND ANSWERS LATEST UPDATE 2026
What is adaptation? - ANSWERSBehavioral adaptations, structural adaptations,
Biochemical adaptations, physiological adaptations.
Natural Selection - ANSWERSis a process in which organisms with certain inherited
characteristics are more likely to survive and reproduce than are individuals with other
characteristics.
Population - ANSWERSa group of individuals of the same species living in the same
place at the same time
Evolution - ANSWERSthe genetic composition of a population changes over time.
Natural selection leads to - ANSWERSA population changing over generations, and
evolutionary adaptation.
The Origin of Species challenged.. - ANSWERSThe notion that earth was relatively
young and populated by unrelated species
The Greek philosopher Aristotle held the belief.. - ANSWERSthat species are fixed and
do not evolve.
Two points from the Origin of Species - ANSWERSOrganisms inhabiting Earth today
descended from ancestral species; Natural selection was the mechanism for descent
with modification
Fossils - ANSWERSImprints or remains of organisms that lived in the past, often found
in sedimentary rocks
Fossil record - ANSWERSIs the ordered sequence of fossils as they appear in rock
layers; reveals the appearance of organisms in a historical sequence; fits the molecular
and cellular evidence that prokaryotes are the ancestors of all life
Paleontologists - ANSWERSAre scientists that study fossils
Biogeography - ANSWERSthe study of the geographic distribution of species that first
suggested to Darwin that today's organisms evolved from ancestral forms.
Comparitive Anatomy - ANSWERSIs the comparison of body structure between
different species; confirms that evolution is a remodeling process
, Homology - ANSWERSThe similarity in structures due to common ancestry
Illustrated by the remodeling of the pattern of bones forming the forelimbs of mammals
Vestigial Structures - ANSWERSAre remnants of features that served important
functions in an organism's ancestors; now have only marginal, if any, importance
DNA, and DNA encoded proteins - ANSWERSThe hereditary background of an
organism is documented in
Darwins two observations - ANSWERSAll species tend to produce excessive numbers
of offspring; Organisms vary, and much of this variation is heritable
Modern synthesis - ANSWERSthe fusion of genetics with evolutionary biology.
Gene pool - ANSWERSThe total collection of alleles in a population at any one time
Microevolution - ANSWERSevolution is occurring on its smallest scale
Genetic drift - ANSWERSA change in the gene pool of a small population; due to
chance
The bottleneck effect - ANSWERSIs an example of genetic drift; results from a drastic
reduction in population size
Founder effect - ANSWERSthe genetic drift resulting from the establishment of a small
new population whose gene pool differs from that of the regular parent population
Gene flow - ANSWERSIs genetic exchange with another population; tends to reduce
genetic differences between populations
fitness - ANSWERSthe contribution an individual makes to the gene pool of the next
generation relative to the contributions of other individuals.
Polygenic traits tend to - ANSWERSproduce phenotypes that vary more or less
continuously.
Single gene traits - ANSWERStend to produce only a few distinct phenotypes.
Genetic variation results from - ANSWERSMutations, changes in the DNA of an
organism, sexual recombination, the shuffling of alleles during meiosis
Gene pool - ANSWERSa reservoir from which the next generation draws its genes.
Alleles can be symbolized by - ANSWERSp for the relative frequency of the dominant
allele in the population; and q for the frequency of the recessive allele in the population
