Which of the following describes a population?
dogs and cats living in Austin, Texas
four species of fish living in a pond
dogwood trees in Middletown, Connecticut
roses and tulips in a garden
Question 2
The accumulation of small changes in a gene pool over a relatively short period is called:
anagenesis
cladogenesis
microevolution
punctuated equilibrium
Question 3
The finches that Darwin studied differed in the shape of their beaks. According to Darwin, the finches
probably:
all had a common ancestor
were born with identical beaks
were descended from similar birds in Africa
ate the same diet
Question 4
Random changes in allele frequency in a population are called:
gene flow
genetic drift
microevolution
stabilizing selection
Question 5
New species form:
when subspecies diverge more and more
because of natural selection
when members of the same species become adapted to new environments
all of the above
Question 6
The hypothesis that evolution occurs at an irregular rate through geologic time is known as:
directional evolution
directional equilibrium
punctuated equilibrium
punctuated evolution
Question 7
The correct equation for the Hardy-Weinberg principle is:
p2 + pq + q2 = 1
p2 + 2pq + q2 = 1
p + 2pq + q = 1
p + pq + q = 1
Question 8
According to the Hardy-Weinberg principle, the p stands for:
the most common allele
the recessive allele
the dominant allele
the least-favored allele
Question 9
Mutations occur because of:
errors in DNA replication
exposure to radiation
exposure to chemicals
all of these
Question 10
The tendency of individuals to mate with those that have the same phenotype is called:
assortative mating
random mating
genetic drift
bottleneck
Question 11
Which of the following would be most likely to decrease genetic variability?
bottleneck
genetic drift
mutation
random mating
Question 12
The resistance of many bacterial species to antibiotics is an example of:
stabilizing selection
directional selection
disruptive selection
extreme selection
Question 13
A drastic short-term reduction of population size caused by natural disasters, disease, or predators is
called:
gene flow
founder effect
microevolution
bottleneck effect
Question 14
The traditional, Darwinian view of evolution was that of:
slow, gradual change over long periods of time
moderate changes over long periods of time
fast, rapid changes in a short amount of time
species do not change
Question 15
Which of the following are types or patterns of natural selection?
disruptive selection
directional selection
stabilizing selection
all of these
Question 16
Speciation that results from the formation of a geographic feature that isolates some members of a
population from other members is an example of:
allopatric speciation
directed speciation
stabilizing speciation
sympatric speciation
Question 17
The Hardy-Weinberg principle states that allele frequencies in a gene pool remain in equilibrium as long
as natural selection is occurring.
True
False .