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Midterm

BIO SCI 94 Study Guide - Midterm Guide: Symbiogenesis, Chlorophyll, Chordate


Department
Biological Sciences
Course Code
BIO SCI 94
Professor
Catherine Loudon
Study Guide
Midterm

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PRACTICE QUESTIONS for Bio 94 tests - Dr. Loudon
The purpose of these practice questions is to give you an idea of what to expect
on exams. You should expect that questions on an exam will vary in level of difficulty
and in type of question (such as factual recall, synthesis, quantitative skills, using
graphs, etc.). Please note that topics might change slightly from year to year (including
additional readings, examples used in lecture, etc.), and so the subject material for
questions used on exams in some years will not be directly relevant in other years.
Some questions draw on information from more than one subject (or textbook chapter).
The set of questions below does NOT represent an actual test because the number of
questions will be different.
1) Consider the following points about a particular lineage of protists: (a) All members
of this lineage live in environments where oxygen availability is low; (b) all members
of this lineage lack mitochondria; and (c) all members of this lineage have some
mitochondrial genes. Based on this information, which of the following statements is
probably true of this lineage?
a) Their ancestors were eukaryotes that existed prior to the origin of mitochondria.
b) Their ancestors had mitochondria, but the mitochondria were lost over
evolutionary time.
c) Their ancestors were not able to metabolize glucose.
d) Members of this lineage are in the process of acquiring mitochondria through
evolutionary adaptation.
e) Members of this lineage had secondary endosymbiosis of mitochondria.
2) The first plants to colonize land had to overcome a number of difficulties. However,
on land the first plants were able to exploit more abundant resources. Which of the
following resources were more plentiful on land than in water?
a) chlorophyll
b) nitrogen
c) water
d) light
e) fungal mutualists
3) Some scientists feel that encouraging the growth (via nutrient fertilization) of
photosynthetic protists in marine environments may help reduce global warming.
Why?
a) Photosynthetic protists give off a lot of carbon dioxide, and fertilizing them would
increase carbon dioxide levels in the atmosphere.
b) Photosynthetic protists fix atmospheric carbon dioxide, decreasing carbon
dioxide levels in the atmosphere.
c) Photosynthetic protists use a lot of oxygen, and fertilizing them would decrease
oxygen levels in the environment.
d) Photosynthetic protists would release a lot of oxygen, and fertilizing them would
increase levels of oxygen in the atmosphere.
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