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CAMPBELL BIOLOGY 8TH ED TEST BANK CHAPTER #28 QUESTIONS WITH VERIFIED ANSWERS
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CAMPBELL BIOLOGY 8TH ED TEST BANK CHAPTER #28 QUESTIONS WITH VERIFIED ANSWERS
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CAMPBELL BIOLOGY 8TH ED TESTBANK CHAPTER #28 QUESTIONS WITH
VERIFIED ANSWERS
1) Protists are alike in that all are
A) unicellular.
B) eukaryotic.
C) symbionts.
D) monophyletic.
E) autotrophic. - Answer-B
Topic: Concept 28.1
: Knowledge/Comprehension
2) Biologists have long been aware that the defunct kingdom Protista is paraphyletic.
Which
of these statements is both true and consistent with this conclusion?
A) Many species within this kingdom were once classified as monerans.
B) Animals, plants, and fungi arose from different protist ancestors.
C) The eukaryotic condition has evolved only once among the protists, and all
eukaryotes are descendants of that first eukaryotic cell.
D) Chloroplasts among various protists are similar to those found in prokaryotes.
E) Some protists, all animals, and all fungi share a protist common ancestor, but these
protists, animals, and fungi are currently assigned to three different kingdoms. - Answer-
E
Topic: Concept 28.1
: Knowledge/Comprehension
3) The strongest evidence for the endosymbiotic origin of eukaryotic organelles is the
similarity between extant prokaryotes and which of the following?
A) nuclei and chloroplasts
B) mitochondria and chloroplasts
C) cilia and mitochondria
D) mitochondria and nuclei
E) mitochondria and cilia - Answer-B
Topic: Concept 28.1
: Knowledge/Comprehension
571
4) According to the endosymbiotic theory of the origin of eukaryotic cells, how did
mitochondria originate?
A) from infoldings of the plasma membrane, coupled with mutations of genes for
proteins in energy-transfer reactions
B) from engulfed, originally free-living prokaryotes
,C) by secondary endosymbiosis
D) from the nuclear envelope folding outward and forming mitochondrial membranes
E) when a Proto eukaryote engaged in a symbiotic relationship with a photobiont -
Answer-B
Topic: Concept 28.1
: Knowledge/Comprehension
5) Which of these statements is false and therefore does not support the hypothesis that
certain eukaryotic organelles originated as bacterial endosymbionts? Such organelles
A) are roughly the same size as bacteria.
B) can be cultured on agar, because they make all their own proteins.
C) contain circular DNA molecules.
D) have ribosomes that are similar to those of bacteria.
E) have internal membranes that contain proteins homologous to those of bacterial
plasma membranes. - Answer-B
Topic: Concept 28.1
: Application/Analysis
6) Which process allowed the nucleomorphs of chlorarachniophytes to be first reduced,
and
then (in a few species) lost altogether, without the loss of any genetic information?
A) conjugation
B) horizontal gene transfer
C) binary fission
D) phagocytosis
E) meiosis - Answer-B
Topic: Concept 28.1
: Knowledge/Comprehension
7) Which organisms represent the common ancestor of all photosynthetic plastids found
in
eukaryotes?
A) autotrophic euglenids
B) diatoms
C) dinoflagellates
D) red algae
E) cyanobacteria - Answer-E
Topic: Concept 28.1
: Knowledge/Comprehension
572 Chapter 28, Protists
8) An individual mixotroph loses its plastids, yet continues to survive. Which of the
following
most likely accounts for its continued survival?
A) It relies on photosystems that float freely in its cytosol.
B) It must have gained extra mitochondria when it lost its plastids.
, C) It engulfs organic material by phagocytosis or by absorption.
D) It has an endospore.
E) It is protected by a siliceous case. - Answer-C
Topic: Concept 28.1
: Knowledge/Comprehension
9) Which of these was not derived from an ancestral alpha proteobacterium?
A) chloroplast
B) mitochondrion
C) hydrogenosome
D) mitosome
E) kinetoplast - Answer-A
Topic: Concepts 28.1, 28.2
: Knowledge/Comprehension
10) A biologist discovers a new unicellullar organism that possesses more than two
flagella and
two small, but equal-sized, nuclei. The organism has reduced mitochondria
(mitosomes),
no chloroplasts, and is anaerobic. To which clade does this organism probably belong?
A) monera
B) the diplomonads
C) the ciliates
D) protista
E) the euglenids - Answer-B
Topic: Concept 28.2
: Knowledge/Comprehension
11) Which two genera have members that can evade the human immune system by
frequently
changing their surface proteins?
1. Plasmodium
2. Trichomonas
3. Paramecium
4. Trypanosoma
5. Entamoeba
A) 1 and 2
B) 1 and 4
C) 2 and 3
D) 2 and 4
E) 4 and 5 - Answer-B
Topic: Concepts 28.2, 28.3
: Knowledge/Comprehension
Chapter 28, Protists 573
12) Which statement regarding resistance is false?
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