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Evolution CRCT
Practice Questions
The structures shown below are _____
a.
vestigial
b.
analogous
c.
heterologous
d.
homologous
d. homologous
How do mutations change populations over time?
a. Most mutations are harmful and cause species
to become extinct
b. Most mutations cause abnormal disease in
species
c. Mutations generally have no effect on a
population since they are simple changes in
DNA
d. Mutation can produce adaptations in organisms
that help them survive better in their
environment
D. Mutation can produce adaptations in
organisms that help them survive better in
their environment
What type of adaptation is shown in below?
Walking stick
a.
b.
c.
d.
artificial selection
Homologous structures
camouflage
mimicry
c. camouflage
Natural selection can best be
defined as the _____.
a.elimination of the smallest organisms by
the biggest organisms
b.survival and reproduction of the organisms
that occupy the largest area
c.survival of the biggest and strongest
organisms in a population
d.survival and reproduction of the organisms
that are genetically best adapted to the
environment
d. survival and reproduction of the
organisms that are genetically best
adapted to the environment
A farmer sprayed his corn crop with an herbicide to kill
the weeds in his field. Most of the weeds died from the
herbicide, but a few were resistant and survived. The
next year, the farmer used the same herbicide on his
field. This time the herbicide did not work as well. The
weeds seemed to be unaffected. Which best explains
this situation?
a. The herbicide caused a mutation in the weeds.
b. The herbicide caused immunity in the weeds.
c. A few weeds in the first population were immune to the
herbicide and passed this trait on to the second
generation.
d. The weeds learned to fight off the herbicide.
c.A few weeds in the first population were
immune to the herbicide and passed this
trait on to the second generation.
Two individuals are unquestionably
members of the same species if they:
a. possess the same number of
chromosomes.
b. breed at the same time.
c. are phenotypically indistinguishable.
d. can mate and produce fertile offspring
e. pass the text of sympatry.
d. can mate and produce fertile offspring
The solidified remains or imprint of a
previously existing organism is called a
a. sediment.
b. layer.
c. fossil.
d. mineral.
c. fossil.
Why are fossils evidence of evolution?
A. They show that living organisms have
remained unchanged throughout time
B. They provide a history of life on earth
C. They show what types of DNA organisms
had
D. They show that organisms have adapted to
extreme environments
B. They provide a history of life on earth
Fossils of animals the size of goats were dated at 5 million
years old. Similarly, fossils of larger animals were dated at
3 million years old. Both animals were similar in body
structure to today's horses. Using these data, which
inference can scientists make?
A. The animals were probably ancestors of
today’s horses
B. The animals had no relationship to one
another.
C. Today's horses and these animals probably
lived together at some time in the past.
D. Today's horses are faster than these animals
were.
A. The animals were probably ancestors of
today’s horses
One very important mechanism for
evolution is genetic drift, which is the
a) Random change in genes within a
population
b) Formation of new species
c) Evolution of two species in response to
each other
d) Ability of an organism to survive in its
environment
a) Random change in genes within a
population
Fossils are useful in
a) Determining how species have change
over time
b) Determining the absolute age of rock
layers only
c) Explaining the theory of natural selection
d) Supporting the theory that mutations are
not always negative.
a) Determining how species have change
over time