IOWA STATE BIO 211 STEWART, EXAM
2 QUESTIONS & CORRECT ANSWERS
ALREADY PASSED
How does malaria affect the human body? - correct answer ✔✔Infect liver and blood cells
What is one major event that a protist caused? - correct answer ✔✔The Irish Potato Famine
What made the Irish Potato Famine so severe? - correct answer ✔✔Over reliance on one crop
(poor had few options)
Low genetic diversity in potato population (low evolutionary potential)
What are the characteristics of protists? - correct answer ✔✔Eukaryotic Cells- have nucleus &
larger than prokaryotic cells
Occur as unicells or as colonies
Relatively simple body plan (lack organ systems)-restricted to wet/moist environment
Movement-Mobility enables protist to seek food and other resources
Autotrophic protists do NOT have a cell wall true or false? - correct answer ✔✔False
Heterotrophic protists do NOT have a cell wall true or false? - correct answer ✔✔True
What is the ancestor of animals? - correct answer ✔✔
, Which statement is correct? - correct answer ✔✔Offspring produced by sexual reproduction
have different combinations of alleles than either parent and therefore traits that could make
better adapted to the environment than either parent.
In animals, most ATP needed to provide cells with sufficient energy is produced by__________ -
correct answer ✔✔Aerobic cellular respiration
A marine biological community includes sea otters, sea urchins, kelp, and many additional
species that depend on kelp for habitat. The sea otter is a keystone of species interactions in this
community, what is the most likely outcome of sea otters are eliminated by human activities? -
correct answer ✔✔Sea urchin abundance increases, kelp abundance declines, species diversity
declines.
Based on info discussed in class and your textbook, which of the following statements describes
a likely cause ( or commonly supported hypothesis) for why species diversity increased
dramatically during Cambrian period (Paleozic era) of Earth's history? - correct answer ✔✔
Which of the following statements is (or are) correct?
A: Both sponges (phylum Porifera) and Cnidarians (phylum Cnidaria) have a hydro skeleton
B: Both sponges and cnidarians have cells organized into tissues and organ systems
C: Both sponges and cnidarians have a central nervous system.
D: All of the above - correct answer ✔✔A
Which of the following statements is (or are) correct?
A: in protists, cellular respiration occurs primarily by anaerobic cellular respiration, which
produces more ATP per glucose molecule than aerobic cellular respiration
B: Mitochandria are absent in protist cells.
C: Some species of protists can reproduce asexually by mitosis, but also reproduce sexually
following meiosis and fusion of the resulting gametes (fertilization)
D: All of the above - correct answer ✔✔C
2 QUESTIONS & CORRECT ANSWERS
ALREADY PASSED
How does malaria affect the human body? - correct answer ✔✔Infect liver and blood cells
What is one major event that a protist caused? - correct answer ✔✔The Irish Potato Famine
What made the Irish Potato Famine so severe? - correct answer ✔✔Over reliance on one crop
(poor had few options)
Low genetic diversity in potato population (low evolutionary potential)
What are the characteristics of protists? - correct answer ✔✔Eukaryotic Cells- have nucleus &
larger than prokaryotic cells
Occur as unicells or as colonies
Relatively simple body plan (lack organ systems)-restricted to wet/moist environment
Movement-Mobility enables protist to seek food and other resources
Autotrophic protists do NOT have a cell wall true or false? - correct answer ✔✔False
Heterotrophic protists do NOT have a cell wall true or false? - correct answer ✔✔True
What is the ancestor of animals? - correct answer ✔✔
, Which statement is correct? - correct answer ✔✔Offspring produced by sexual reproduction
have different combinations of alleles than either parent and therefore traits that could make
better adapted to the environment than either parent.
In animals, most ATP needed to provide cells with sufficient energy is produced by__________ -
correct answer ✔✔Aerobic cellular respiration
A marine biological community includes sea otters, sea urchins, kelp, and many additional
species that depend on kelp for habitat. The sea otter is a keystone of species interactions in this
community, what is the most likely outcome of sea otters are eliminated by human activities? -
correct answer ✔✔Sea urchin abundance increases, kelp abundance declines, species diversity
declines.
Based on info discussed in class and your textbook, which of the following statements describes
a likely cause ( or commonly supported hypothesis) for why species diversity increased
dramatically during Cambrian period (Paleozic era) of Earth's history? - correct answer ✔✔
Which of the following statements is (or are) correct?
A: Both sponges (phylum Porifera) and Cnidarians (phylum Cnidaria) have a hydro skeleton
B: Both sponges and cnidarians have cells organized into tissues and organ systems
C: Both sponges and cnidarians have a central nervous system.
D: All of the above - correct answer ✔✔A
Which of the following statements is (or are) correct?
A: in protists, cellular respiration occurs primarily by anaerobic cellular respiration, which
produces more ATP per glucose molecule than aerobic cellular respiration
B: Mitochandria are absent in protist cells.
C: Some species of protists can reproduce asexually by mitosis, but also reproduce sexually
following meiosis and fusion of the resulting gametes (fertilization)
D: All of the above - correct answer ✔✔C
