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BIOLOGY 262, FALL 2009 – IN-CLASS EXAM
EXAMINATION #3 (PART 1)
Date
MULTIPLE CHOICE.⎯For the following multiple choice questions circle the letter in front of the
response that best answers the question or completes the sentence. (20%, 2% each)
6. Which of the following best describes the
1. Which of the following IS an assumption
community ecology relationship of a
of scientific philosophy?
squirrel eating an acorn (oak seed)?
a. Different events must be caused
uniquely.
a. Interspecific amensalism
b. Hypotheses can be proven True.
b. Intraspecific amensalism
c. Sense experience represents reality with
c. Interspecificcommensalism
some reasonable consistency.
d. Intraspecific commensalism
d. The universe is chaotic (unordered).
e. Interspecific grazing
e. None of the above. (None are assumptions of
f. Intraspecific grazing
scientific philosophy)
g. Interspecific predation
2. Which of the following is the name of the
h. Intraspecific predation
model organism Saccharomyces cervisiae
i. None of the above
belongs?
7. Which of the following most limits
a. baker’s yeast
primary production in terrestrial
b. fruit fly
environments?
c. mouse-ear cress
a. light and nutrients
d. pink mold a
b. light and water
e. None of the above
c. light and temperature
3. Given the following genotypes in a
d. nutrients and temperature
population: 640 AA, 320 Aa, 40 aa. Is
e. temperature and water
this population evolving with respect to
8. In which of the following parts of a
the “A” gene?
flower does meiosis occur?
a. No
a. anther
b. Yes
b. filament
c. Cannot determine with the info. given.
c. petal
4. Which of the following is when a
d. sepal
bacterium takes in DNA (as a plasmid)
e. stigma
directly from the environment?
9. Determine the status of the hypothesis
a. binary fission
that “bacterial species richness will be
b. conjugation
greater on clothed skin” using these
c. transcription
data:
d. transformation
Mean species richness clothed skin = 6.3
e. None of the above
5. Which of the following is when a
bacterium causes severe disease symptoms
due to reproduction of the bacterium
itself?
a. high invasiveness
b. high toxigenicity
c. low invasiveness
d. low toxigenicity
e. low xylicity
Mean species richness unclothed skin = 8.2
P-value = 0.01
a. Hypothesis Supported
b. Hypothesis Rejected
c. Cannot determine with the info. given.
10. Which of the following increases
genetic variation in a population?
a. founder effect
b. genetic drift
c. inbreeding
d. mutation
e. natural selection
FILL-IN-THE-BLANK/SHORT PROBLEM.⎯For the following exercises write the appropriate word or
words in the available space, sketch, or label as appropriate. (10%)
2. Provide the summary equation for
1. In the space below sketch and label a
photosynthesis? (2%)
“typical” FUNGAL cell. Be certain to label
at least six things. (6%)
3. In plants, any extra product of photosynthesis
can be used structurally or stored. What is the
name of each of these molecules? (2%)
Structural____________________________
Storage______________________________
DEFINITIONS.⎯For the following BIOLOGICAL words or phrases define them as accurately
and concisely as possible. (20%, 4% each)
1. Genetic Drift:
2. Hypha (plural = hyphae):
3. Meiosis:
4. Natural Selection:
5. Seed:
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BIOLOGY 262, FALL 2009 - EXAMINATION #3 (PART 2)
Date
FREE RESPONSE QUESTIONS/PROBLEMS.⎯For the following, address each in as concise and lucid a
manner as possible. Do NOT exceed the space provided. (50%)
1. Fill in the data in the table (the outgroup, liverworts, and one column of date have been completed for
you), then use the data in the table to construct a phylogenetic tree of the phyla in the left column.
Show the derived traits/synapomorphies on your phylogenetic tree. (10%)
Heterosporous
or
homosporous?
Which life cycle
generation
dominant?
Vascular tissue
present or
absent?
Type of
Growth
Pterophyta
apical
Coniferophyta
apical
Anthophyta
apical
Bryophyta
apical
Liverworts OG
homosporous
gametophyte
vasc. tissue absent
thallose
2. Describe/explain the life cycle of a member of Phylum Coniferophyta. Include all life cycle stages,
relevant unique structures, and label their ploidy. Also indicate all cellular processes that occur.
Indicate the life cycle generation that is considered to be dominant. (20%) (Feel free but do not feel obliged
to use labeled illustrations for your answer.)
3. To reduce the frequency of antibiotic resistant bacteria in the environment it is
recommended that antibiotics be used less frequently. Why would less frequent use of antibiotics
result in greater frequency of susceptible bacteria over time? Provide a brief evolutionary
explanation. (10%)
4. Describe the carbon cycle and make sure you indicate the specific forms of carbon involved and the
processes that convert the carbon to different forms. (8%) (Feel free but do not feel obliged to use labeled
illustrations for your answer.)
5. Explain how the carbon cycle is associated with concerns about global climate change (global
warming). (2%)