Biology 1103 Final Exam GSU Dr. Sylvester complete
questions answered 2025/2026 update
An antibiotic is given repeatdley to treat a recurrent ear infection. It worked
initially but now is no longer effective. This indicates that the streptococcus
bacterium - correct answer experienced natural selection that has allowed the
resistant streptococcus to survive and multiply.
Genetic variations in natural populations develop due to - correct answer
random mutations of the DNA
Which of the following statements about mutations is TRUE? - correct answer
Mutations occur at random and are by chance
*MUTATIONS ARE RANDOM*
The theory of natural selection states that - correct answer The most well
adapted individuals in their environments survive and reproduce, contributing the
most genes to the next generation.
Which mutation provides a reproductive advantage - correct answer A flower
that attracts more bees
An emu is a flightless bird that still has wings. These wings are an example of -
correct answer Vestigial Structures
*Analogous Structures= structures that look the same but have different
functions
*Homologous structures= Common Ancestor different variations of the same
bones. Think Humans forelimbs and the forelimbs of birds.
* Vestigial= Structures that have no function (
Convergent evolution occurs when - correct answer Unrelated organisms
develop analogous structures
Which of the following is an excellent example of artificial selection? - correct
answer The many different breeds of domestic cats
* AS is manmade natural selection, think of plants and dog breeds.
The gene pool for a particular gene is made up of - correct answer All the alleles
that occur in the population
In a single family, the parents have brown eyes but all five of their children have
green eyes This is an example of evolution. - correct answer False
Populations of organisms are constantly evolving which means they are always -
correct answer Changing
*Evolution= Change/Time
In equilibrium population - correct answer Allele frequencies do not change
*Perfect Population
1
, Biology 1103 Final Exam GSU Dr. Sylvester complete
questions answered 2025/2026 update
*No gene flow
*No natural selection
*No mutations
A population carries two alleles for a trait in which T is dominant and t is
recessive. In the Hardy- Weinberg equation, p^2 represents the - correct answer
Homozygous Dominant
* Remember the equation
p+q=1
P^2+ q^2+ 2pq=1
P= the homozygous dominant
q= Homozygous recessive
2pq=Heterozygous
According to the Hardy-Weinberg principle, if 75% of the alleles in the gene pool
are A1 and 25% are A2, what is the proportion of individuals with the genotype
A1A2 in the population? - correct answer 0.375
p+q=1--> .75+.25=1
2pq= 2(.75)(.25)=.375
.75^2 +.375+.25^2=1
p^2+2pq+q^2=1
Which of the following can cause the most evolutionary change in a small
population? - correct answer Genetic Drift
Inbreeding is defined as - correct answer Sexual reproduction among closely
related individuals
Elephants used to number in the millions until excessive hunting brought their
numbers down. The 30,000 elephant seals alive today are genetically very similar
due to - correct answer Bottleneck Effect
The biological concept of species requires that - correct answer Organisms
reproduce sexually
Hybrid inviability occurs when two species mate and produce fertile offspring able
to move into new inhabitants. - correct answer False
Hybrid Inviability- offspring are unable to survive, meme,her this is post mating
isolation
2
questions answered 2025/2026 update
An antibiotic is given repeatdley to treat a recurrent ear infection. It worked
initially but now is no longer effective. This indicates that the streptococcus
bacterium - correct answer experienced natural selection that has allowed the
resistant streptococcus to survive and multiply.
Genetic variations in natural populations develop due to - correct answer
random mutations of the DNA
Which of the following statements about mutations is TRUE? - correct answer
Mutations occur at random and are by chance
*MUTATIONS ARE RANDOM*
The theory of natural selection states that - correct answer The most well
adapted individuals in their environments survive and reproduce, contributing the
most genes to the next generation.
Which mutation provides a reproductive advantage - correct answer A flower
that attracts more bees
An emu is a flightless bird that still has wings. These wings are an example of -
correct answer Vestigial Structures
*Analogous Structures= structures that look the same but have different
functions
*Homologous structures= Common Ancestor different variations of the same
bones. Think Humans forelimbs and the forelimbs of birds.
* Vestigial= Structures that have no function (
Convergent evolution occurs when - correct answer Unrelated organisms
develop analogous structures
Which of the following is an excellent example of artificial selection? - correct
answer The many different breeds of domestic cats
* AS is manmade natural selection, think of plants and dog breeds.
The gene pool for a particular gene is made up of - correct answer All the alleles
that occur in the population
In a single family, the parents have brown eyes but all five of their children have
green eyes This is an example of evolution. - correct answer False
Populations of organisms are constantly evolving which means they are always -
correct answer Changing
*Evolution= Change/Time
In equilibrium population - correct answer Allele frequencies do not change
*Perfect Population
1
, Biology 1103 Final Exam GSU Dr. Sylvester complete
questions answered 2025/2026 update
*No gene flow
*No natural selection
*No mutations
A population carries two alleles for a trait in which T is dominant and t is
recessive. In the Hardy- Weinberg equation, p^2 represents the - correct answer
Homozygous Dominant
* Remember the equation
p+q=1
P^2+ q^2+ 2pq=1
P= the homozygous dominant
q= Homozygous recessive
2pq=Heterozygous
According to the Hardy-Weinberg principle, if 75% of the alleles in the gene pool
are A1 and 25% are A2, what is the proportion of individuals with the genotype
A1A2 in the population? - correct answer 0.375
p+q=1--> .75+.25=1
2pq= 2(.75)(.25)=.375
.75^2 +.375+.25^2=1
p^2+2pq+q^2=1
Which of the following can cause the most evolutionary change in a small
population? - correct answer Genetic Drift
Inbreeding is defined as - correct answer Sexual reproduction among closely
related individuals
Elephants used to number in the millions until excessive hunting brought their
numbers down. The 30,000 elephant seals alive today are genetically very similar
due to - correct answer Bottleneck Effect
The biological concept of species requires that - correct answer Organisms
reproduce sexually
Hybrid inviability occurs when two species mate and produce fertile offspring able
to move into new inhabitants. - correct answer False
Hybrid Inviability- offspring are unable to survive, meme,her this is post mating
isolation
2
