Biology, Eighth Edition (Raven)

Chapter 29: Protists

Pre Test

1
From figure 29.1, which organisms probably have the most similar genomes? (p. 562)
A)Diplomonads and euglenozoa
B)Alveolata and euglenozoa
C)Euglenozoa and stramenopila
D)Alveolata and stramenopila
E)Stramenopila and rhodophyta
2
What structure was ultimately responsible for the establishment of a nuclear envelope? (p. 563)
A)Changes in the DNA composition allowed phospholipids to accumulate around the chromatin, forming a barrier.
B)The rough ER and smooth ER formed to increase the membrane surface area, eventually surrounding the nucleus.
C)The nuclear envelope occurred as a result of the cell's improvements in metabolic efficiency, leaving additional energy available for the production of intracellular compartments.
D)Infoldings of the cell membrane gradually increased to allow the cell to achieve larger volumes. Eventually partitioning of the nucleus provided additional control over gene expression.
E)Natural selection favors complexity, and thus the nuclear envelope gradually was established.
3
Which of the following forms of nutritional acquisition has not yet been seen in members of the protist grouping? (p. 565)
A)Chemoheterotrophism
B)Chemoautotrophism
C)Photoheterotrophism
D)Photoautotrophism
E)All strategies have been documented in protists.
4
True or false: An undulating membrane is a characteristic of parabasalids. (p. 567)
A)True
B)False
5
The kinetoplastids have a conspicuous organelle for which they are named. What is the role of the kinetoplastid? (p. 568)
A)It attracts mates.
B)It is photosynthetic.
C)It stores DNA for sexual reproduction.
D)It is their mitochondrion.
E)The kinetoplastid acts as a spore which can survive adverse conditions.
6
The namesake for alveolata is the collection of membrane stacks just under their cell membrane. What is their likely purpose? (p. )
A)They make the cells buoyant.
B)They discourage predators.
C)They're probably used for membrane transport activities.
D)Because of these vesicles, they can protect themselves from the immune system of their host cells.
E)They help make the cells "sparkle" at night in warm ocean water.
7
Like plants, brown algae have multicellular haploid and multicellular diploid stages in their life cycle. This is called (p. 573)
A)haplontic.
B)diplontic.
C)haplodiplontic.
D)alternation of generations.
E)confusing.
8
True or false: The Rhodophyta group emerged from members of the flowering plants. (p. 576)
A)True
B)False
9
Which feature is characteristic of choanoflagellates? (p. 576)
A)Their choice of bacteria for food.
B)They are the only protist which is colonial.
C)They lack mitochondria.
D)They are the only protist which does not have members which are photosynthetic.
E)A single flagellum surrounded by a contractile collar.
10
True or false: Different groups of amoeboid protista likely have the similar cell morphology through convergent evolution, and so can therefore be described as a polyphyletic group. (p. 576)
A)True
B)False
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