BIOL 152: Evolution and Biodiversity
Spring 2018 – Dr. Der; Cal State Fullerton
Exam 1, Version B
Name: Key
CWID:
Lab Section:
Lab Instructor:
Lab Day and Time:
Write your name on every page of this exam. Complete answers for questions 1 – 45 on
Scantron form F-1712-PAR-L. You may use the second page for scratch paper. Turn in the
entire paper exam along with your scantron. You may not use a calculator on this exam.
EXAM VERSION B Name:
Page 2 of 16
THIS PAGE IS INTENTIONALLY LEFT BLANK.
Use this space for notes or scratch paper for calculations.
EXAM VERSION B Name:
Page 3 of 16
TRUE or FALSE: (1 pt each) Evaluate each statement.
Mark [A] TRUE. Mark [B] FALSE.
A B
1. True / False Evolution is an increasingly well-supported scientific theory.
2. True / False Populations can still evolve even if they lack genetic variation.
3. True / False Evolution explains the origin of life on earth.
4. True / False Evolution is a completely random process.
5. True / False Genetic drift is a completely random process.
6. True / False Individuals adapt to their environment through natural selection.
7. True / False Adaptation is the result of evolution by natural selection.
8. True / False Evolution and natural selection refer to the same process.
9. True / False The founder effect is an example of gene flow.
10. True / False Mutation is the ultimate source of all variation.
11. True / False Mutations occur to filter out the less fit individuals.
12. True / False Evolution must be occurring if a population is not in Hardy-
Weinberg equilibrium, even if allele frequencies remain constant.
Matching: (1 pt. each) Match each term on the left with the best definition on the right. For
answers with two letters, both letters must be marked to be scored correct. Some answers
will not be used. Some answers may be used more than once.
Questions:
Answers:
13. Analogous C
A. A trait that is inherited from a common ancestor.
14. Homologous A
B. A trait that has evolved independently in different
species.
15. Homoplasious D
C. A trait that performs a similar function in highly
unrelated species.
16. Symplesiomorphy BC
D. A trait that has been gained and lost multiple times
on a phylogeny.
17. Synapomorphy AB
E. A unique derived trait.
18. Autapomorphy E
AA. A shared ancestral trait.
19. Vestigial AD
AB. A shared derived trait.
20. Convergent B
AC. A unique ancestral trait.
AD. An ancestral trait that has been dramatically
reduced and is no longer functional.
AE. A trait that cannot be reliably mapped on a
phylogeny.
EXAM VERSION B Name:
Page 4 of 16
Multiple choice: (2 points each). Select the ONE best answer.
21. How does a scientific theory differ from a scientific hypothesis?
A) Theories are proposed to test scientific hypotheses.
B) Theories are usually an explanation for a more general phenomenon; hypotheses
typically address more specific issues.
C) You can do experiments to prove hypotheses but not theories.
D) Hypotheses are usually an explanation for a more general phenomenon; theories
typically address more specific issues.
E) Confirmed theories become scientific laws; hypotheses become theories.
22. A controlled experiment .
A) is repeated many times to ensure that the results are accurate
B) proceeds at a slow pace to guarantee that the scientist can carefully observe all
reactions and process all experimental data
C) includes at least two groups, one of which does not receive the experimental
treatment
D) includes at least two groups, one differing from the other by two or more variables
E) includes one group for which the scientist controls all variables
23.
Agrobacterium
infects plants and causes them to form tumors. You are asked to
determine how long a plant must be exposed to these bacteria to become infected. Which
of the following experiments will provide the best data to address that question?
A) Determine the survival rate of
Agrobacterium
when exposed to different
concentrations of an antibiotic.
B) Measure the number of tumors formed on a plant when exposed to various
concentrations of
Agrobacterium
.
C) Measure the concentration of
Agrobacterium
in different soil environments
where the plants grow.
D) Measure the number of tumors formed on plants, which are exposed to
Agrobacterium
for different lengths of time.
EXAM VERSION B Name:
24. Eukaryotes differ from both archaea and bacteria because .
A) they have cells containing mitochondria
B) they have DNA packed with histone proteins
C) the cell membrane contains peptidoglycan
D) they begin translation with methionine
E) they have amino acid start codons encoding for methionine
25. In comparison to eukaryotes, prokaryotes .
A) are smaller
B) are larger
