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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
eukaryotic cells arose from communities of prokaryotes.
B
prokaryotic cells arose from organelles of eukaryotes.
C
viruses arose from fragments of prokaryotic cells.
D
the first organisms were microscopic algae and bacteria.
2) Most genetic variation is due to
A
artificial selection and natural selection.
B
founder effects and sexual recombination.
C
mutation and genetic shuffling.
D
mutation and natural selection.
3) Speciation cannot take place without
A
reproductive isolation.
B
geographic isolation.
C
disruptive selection.
D
homologous structures.
4) The random change of allele frequencies in a population is called
A
genetic drift.
B
gene flow
C
selection.
D
mutation.
5) What are the sources of genetic variability?
A
mutations, lateral gene transfer, genetic recombination during sexual reproduction
B
migration, natural selection, and founder effects
C
emmigration, genetic drift, and bottleneck effect
D
immigration, founder effects, and artificial selection
6) When allele frequencies in a population remain constant, and evolution does not occur, this is referred to as
A
the founder effect.
B
genetic equilibrium.
C
genetic drift.
D
the bottleneck effect.
7) Evolution in a population has occured when
A
artificial selection is used.
B
the allele frequencies stay the same.
C
the allele frequencies change.
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
stabilizing selection.
C
disruptive selection.
D
sexual selection.
9) The number of different genes that control a trait determine the
A
size of the gene pool.
B
chance that natural selection will occur.
C
number of phenotypes for the trait.
D
allele frequencies for the trait.
10) The weight of human infants at birth is under the influence of
A
disruptive selection.
B
stabilizing selection.
C
artificial selection.
D
directional selection.
11) One scientific hypothesis about the origin of life holds that
A
RNA replaced DNA as the most stable information-storing molecule.
B
proteins that duplicate themselves came to function in information storage.
C
RNA existed before DNA.
D
as cells evolved, they stopped using RNA entirely.
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
can apply to more than one animal.
D
are in Latin.
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
the importance of each derived character
D
all traits of each organism analyzed
*select an answer for all questions
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