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Chapter 17, 18 And 19 Review
Test Description: Review for final
Instructions: Answer all questions to get your test result.
1) The endosymbiotic theory states that
A
the first organisms were microscopic algae and bacteria.
B
prokaryotic cells arose from organelles of eukaryotes.
C
eukaryotic cells arose from communities of prokaryotes.
D
viruses arose from fragments of prokaryotic cells.
2) Most genetic variation is due to
A
artificial selection and natural selection.
B
mutation and genetic shuffling.
C
mutation and natural selection.
D
founder effects and sexual recombination.
3) Speciation cannot take place without
A
reproductive isolation.
B
disruptive selection.
C
geographic isolation.
D
homologous structures.
4) The random change of allele frequencies in a population is called
A
selection.
B
gene flow
C
mutation.
D
genetic drift.
5) What are the sources of genetic variability?
A
mutations, lateral gene transfer, genetic recombination during sexual reproduction
B
immigration, founder effects, and artificial selection
C
emmigration, genetic drift, and bottleneck effect
D
migration, natural selection, and founder effects
6) When allele frequencies in a population remain constant, and evolution does not occur, this is referred to as
A
genetic equilibrium.
B
genetic drift.
C
the founder effect.
D
the bottleneck effect.
7) Evolution in a population has occured when
A
the allele frequencies change.
B
artificial selection is used.
C
the allele frequencies stay the same.
D
the allele frequencies do not change.
8) In a population of birds, it is an advantage to have a small beak to reach insects in crevices and it is also beneficial to have a large beak to crush seeds. It is a disadvantage to have an average beak size. This is an example of
A
directional selection.
B
sexual selection.
C
stabilizing selection.
D
disruptive selection.
9) The number of different genes that control a trait determine the
A
size of the gene pool.
B
allele frequencies for the trait.
C
chance that natural selection will occur.
D
number of phenotypes for the trait.
10) The weight of human infants at birth is under the influence of
A
stabilizing selection.
B
directional selection.
C
artificial selection.
D
disruptive selection.
11) One scientific hypothesis about the origin of life holds that
A
proteins that duplicate themselves came to function in information storage.
B
RNA replaced DNA as the most stable information-storing molecule.
C
as cells evolved, they stopped using RNA entirely.
D
RNA existed before DNA.
12) One reason common names are not useful to biologists is that they
A
require the use of a dichotomous key.
B
are too long.
C
are in Latin.
D
can apply to more than one animal.
13) What does a cladistic analysis show about organisms?
A
the relative degrees of relatedness among lineages
B
the general fitness of the organisms analyzed
C
all traits of each organism analyzed
D
the importance of each derived character
*select an answer for all questions
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