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Natural Selection Quiz
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. Natural selection can best be defined as...
a.
b.
c.
d.
Survival of the biggest and strongest organisms in a population.
Elimination of the smallest organisms by the biggest organisms
Purposely breeding two organisms to make offspring with desired traits.
Survival and reproduction of the organisms that are genetically best adapted to
the environment.
____
2. Natural selection operates to produce changes in...
a. individuals
b. an entire species
c. only animals
d. populations
____
3. Which type of natural selection is seen in the following scenario?
Giraffe Neck Length:
Many tall trees are available for long necked giraffes.
Some medium trees are available for average-length necked giraffes.
No trees are available for short necked giraffes.
a. Stabilizing
b. Directional
____
4. The frequency of a gene that offers high adaptive value to a population may decrease in future
generations if -a.
b.
c.
d.
____
The frequency of the genes in one individual
The frequency of the genes in the population
The number of genes in one chromosome
The number of genes in the species
6. When a farmer breeds only his or her best livestock, the process involved is:
a.
b.
c.
d.
____
conditions remain stable
no organisms move in or out of the population
all organisms with the trait survive and reproduce
the environment changes
5. Some organisms have genes that improve their ability to survive and reproduce. If the genes also
help their offspring survive and reproduce, then which of the following will most likely increase? (7E)
a.
b.
c.
d.
____
c. Disruptive
d. Artificial
Natural seleciton
Genetic drift
Founder effect
Artificial selection
7. Which type of natural selection shown below could result in two separate species?
a.
c.
b.
d.
____
8. Differences between the members of a population will most likely be passed on to future
generations if they are -- (7E)
a. due to genetic changes and result in unfavorable variations.
b. not due to genetic changes and result in favorable variations.
c. not due to genetic changes and result in unfavorable variations.
d. due to genetic changes and result in favorable variations.
____
9. The average individuals in a population are favored in ____________ selection.
a. disruptive
b. directional
c. stabilizing
d. artificial
____ 10. Genetic variation can aid in the survival of species when the environment changes. Which of the
following is the best example of an organism with a genetic variation that could improve survival
chances over time? (7D)
a.
b.
c.
d.
An ant that is resistant to pesticide
A wasp that is infected with parasites
A cactus that has no spines
A mouse that has learned to avoid mousetraps
____ 11. Organisms moving into or out of a population, thus taking their alleles with them is known as
________________.
a.
b.
c.
d.
gene flow
genetic drift
founder effect
genetic equilibrium
____ 12. Which of the following would help keep a population at genetic equilibrium?
a.
b.
c.
d.
Mutations occuring randomly in individual’s DNA
Random mating
Natural selection
Disease and predation
____ 13. If a mutation introduces a new skin color in a lizard population, which factor might determine
whether the frequency of the new allele will increase?
a. how many other alleles are present
b. whether the mutation makes some lizards more fit for their environment than other
lizards
c. how many phenotypes the population has
d. whether the mutation was caused by nature or by human intervention
____ 14. In genetic drift, allele frequencies change because of
a. mutations
c. natural selection
b. chance events
d. genetic equilibrium
____ 15. The type of genetic drift that follows the colonization of a new habitat by a small group of individuals
is called
a. the Hardy-Weinberg principle.
b. gene flow
c. founder effect
d. stabilizing selection
____ 16. During a study session about evolution, one of your fellow students remarks, "The giraffe stretched
its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which
statement is most likely to be helpful in correcting this student's misconception? (7C)
a. Characteristics acquired during an organism's life are generally not passed on
through genes.
b. Spontaneous mutations can result in the appearance of new traits.
c. Only favorable adaptations have survival value.
d. Disuse of an organ may lead to its eventual disappearance.
____ 17. Mendel was to genetics, as _____________ is to natural selection.
a. Hardy
b. Weinberg
c. Einstein
d. Darwin
____ 18. A harmless scarlet king snake and a venomous eastern coral snake have similar band patterns, as
shown below. For the scarlet king snake, the adaptation of having a banding pattern like the eastern
coral snake’s is known as mimicry. (7E)
The outcome of this adaptation in the scarlet king snake is to —
a.
b.
c.
d.
make it easier for the scarlet king snake to attract prey
make it easier for the scarlet king snake to interbreed with the other snake
allow the scarlet king snake to blend in with its environment
protect the scarlet king snake from predators