front 1 1) According to the endosymbiotic theory, why was it adaptive for the
larger (host) cell to keep the engulfed cell alive, rather than
digesting it as food? C) The engulfed cell allowed the host cell to metabolize
glucose. | back 1 A |
front 2 2) The chloroplasts of land plants are thought to have been derived
according to which evolutionary sequence? C) red algae → brown algae → green algae → land plants D) cyanobacteria → red algae → green algae → land plants | back 2 A |
front 3 3) A particular species of protist has obtained a chloroplast via
secondary endosymbiosis. You know this because the chloroplasts
________. C) have three or four membranes | back 3 C |
front 4 4) All protists are ________. A) unicellular D) mixotrophic | back 4 B |
front 5 5) An individual mixotroph loses its plastids, yet continues to
survive. Which of the following most likely accounts for its continued
survival? C) It engulfs organic material by phagocytosis or by absorption. D) It has an endospore. | back 5 C |
front 6 6) Which of the following have chloroplasts (or structures since
evolved from chloroplasts) thought to be derived from ancestral green
algae? C) dinoflagellates | back 6 D |
front 7 7) Use the following information to answer the question. Paulinella chromatophora is one of the few cercozoans that is autotrophic, carrying out aerobic photosynthesis with its two elongated "chromatophores." The chromatophores are contained within vesicles of the host cell, and each is derived from a cyanobacterium, though not the same type of cyanobacterium that gave rise to the chloroplasts of algae and plants. The closest living relative of P. chromatophora is the heterotroph
P. ovalis. P. ovalis uses threadlike pseudopods to capture its prey,
which it digests internally. Which of the following, if observed,
would be the best reason for relabeling P. chromatophora as a
mixotroph instead of an autotroph? | back 7 B |
front 8 8) Use the following information to answer the question. Paulinella chromatophora is one of the few cercozoans that is autotrophic, carrying out aerobic photosynthesis with its two elongated "chromatophores." The chromatophores are contained within vesicles of the host cell, and each is derived from a cyanobacterium, though not the same type of cyanobacterium that gave rise to the chloroplasts of algae and plants. Which process could have allowed the nucleomorphs of
chlorarachniophytes to be reduced, without the net loss of any genetic
information? C) phagocytosis | back 8 B |
front 9 9) Use the following information to answer the question. Giardia intestinalis is an intestinal parasite of humans and other mammals that causes intestinal ailments in most people who ingest the cysts. Upon ingestion, each cyst releases two motile cells, called trophozoites. These attach to the small intestine's lining via a ventral adhesive disk. The trophozoites anaerobically metabolize glucose from the host's intestinal contents to produce ATP. Reproduction is completely asexual, occurring by longitudinal binary fission of trophozoites, with each daughter cell receiving two haploid nuclei (n = 5). A trophozoite will often encyst as it passes into the large intestine by secreting around itself a case that is resistant to cold, heat, and dehydration. Infection usually occurs by drinking untreated water that contains cysts. The cysts of Giardia function most like the ________. A) mitochondria of ancestral diplomonads D) capsids of viruses | back 9 C |
front 10 10) Consider the following data: (a) Most ancient eukaryotes are unicellular. (b) All eukaryotes alive today have a nucleus and cytoskeleton. (c) Most ancient eukaryotes lack a cell wall. Which of the following conclusions could reasonably follow the data presented? The first eukaryote may have been ________. A) very similar to a plant cell B) anaerobic D) photosynthetic | back 10 C |
front 11 11) Use the following information to answer the question. Giardia intestinalis is an intestinal parasite of humans and other mammals that causes intestinal ailments in most people who ingest the cysts. Upon ingestion, each cyst releases two motile cells, called trophozoites. These attach to the small intestine's lining via a ventral adhesive disk. The trophozoites anaerobically metabolize glucose from the host's intestinal contents to produce ATP. Reproduction is completely asexual, occurring by longitudinal binary fission of trophozoites, with each daughter cell receiving two haploid nuclei (n = 5). A trophozoite will often encyst as it passes into the large intestine by secreting around itself a case that is resistant to cold, heat, and dehydration. Infection usually occurs by drinking untreated water that contains cysts. Giardia's mitosome can be said to be "doubly degenerate,"
because it is a degenerate type of ________, an organelle that is
itself a degenerate form of ________. C) mitochondria; proteobacterium | back 11 C |
front 12 12) Use the following information to answer the question. Giardia intestinalis is an intestinal parasite of humans and other mammals that causes intestinal ailments in most people who ingest the cysts. Upon ingestion, each cyst releases two motile cells, called trophozoites. These attach to the small intestine's lining via a ventral adhesive disk. The trophozoites anaerobically metabolize glucose from the host's intestinal contents to produce ATP. Reproduction is completely asexual, occurring by longitudinal binary fission of trophozoites, with each daughter cell receiving two haploid nuclei (n = 5). A trophozoite will often encyst as it passes into the large intestine by secreting around itself a case that is resistant to cold, heat, and dehydration. Infection usually occurs by drinking untreated water that contains cysts. The mitosome of Giardia has no DNA within it. If it did contain
DNA, then what predictions should we be able to make about its
DNA? C) It is circular, has many introns, and is complexed with histone proteins. D) It is circular, has few introns, and is not associated with histone proteins. | back 12 D |
front 13 13) Use the following information to answer the question. Giardia intestinalis is an intestinal parasite of humans and other mammals that causes intestinal ailments in most people who ingest the cysts. Upon ingestion, each cyst releases two motile cells, called trophozoites. These attach to the small intestine's lining via a ventral adhesive disk. The trophozoites anaerobically metabolize glucose from the host's intestinal contents to produce ATP. Reproduction is completely asexual, occurring by longitudinal binary fission of trophozoites, with each daughter cell receiving two haploid nuclei (n = 5). A trophozoite will often encyst as it passes into the large intestine by secreting around itself a case that is resistant to cold, heat, and dehydration. Infection usually occurs by drinking untreated water that contains cysts. Given its mode of reproduction and internal structures, which of
the following should be expected to occur in Giardia at some stage of
its life cycle? C) meiosis | back 13 A |
front 14 14) Use the following information to answer the question. Giardia intestinalis is an intestinal parasite of humans and other mammals that causes intestinal ailments in most people who ingest the cysts. Upon ingestion, each cyst releases two motile cells, called trophozoites. These attach to the small intestine's lining via a ventral adhesive disk. The trophozoites anaerobically metabolize glucose from the host's intestinal contents to produce ATP. Reproduction is completely asexual, occurring by longitudinal binary fission of trophozoites, with each daughter cell receiving two haploid nuclei (n = 5). A trophozoite will often encyst as it passes into the large intestine by secreting around itself a case that is resistant to cold, heat, and dehydration. Infection usually occurs by drinking untreated water that contains cysts. If the mitosomes of Giardia contain no DNA, yet are descendants of
what were once free-living organisms, then where are we likely to find
the genes that encode their structures, and what accounts for their
current location there? B) plasmids; transformation | back 14 C |
front 15 15) Trypanosome infections evade attacks by host immune systems
through which of the following mechanisms? B) production of toxins that kill lymphocytes | back 15 A |
front 16 16) Many parasitic members of the excavates lack plastids and have
highly reduced mitochondria. Which of the following statements
explains these observations? | back 16 C |
front 17 17) Prokaryotic and eukaryotic flagella ________. A) have the same evolutionary origin D) contain their own DNA | back 17 B |
front 18 18) When a mosquito infected with Plasmodium first bites a human, the Plasmodium ________. A) gametes fuse, forming an oocyst D) oocyst undergoes meiosis | back 18 B |
front 19 19) Which two genera have members that can evade the human immune
system by frequently changing their surface proteins? C) Trichomonas and Trypanosoma | back 19 A |
front 20 20) Which of the following pairs of protists and their ecological roles are correctly matched? A) apicomplexans—parasites of animals D) entamoebas—free-living soil organisms | back 20 A |
front 21 21) Dinoflagellates ________. A) possess two flagella D) include species that cause malaria | back 21 A |
front 22 22) You are given an unknown organism to identify. It is unicellular
and heterotrophic. It is motile, using many short extensions of the
cytoplasm, each featuring the 9 + 2 filament pattern. It has
well-developed organelles and two nuclei, one large and one small.
This organism is most likely to be a ________. | back 22 C |
front 23 23) Which of the following is characteristic of ciliates? D) Most live as solitary autotrophs in fresh water. | back 23 B |
front 24 24) Diatoms are mostly asexual members of the phytoplankton. Diatoms lack any organelles that might have the 9 + 2 pattern. They obtain their nutrition from functional chloroplasts, and each diatom is encased within two porous, glasslike valves. Which question would be most important for one interested in the day-to-day survival of individual diatoms? A) How do diatoms get transported from one location on the water's
surface layers to another location on the surface? D) How do diatom sperm cells locate diatom egg cells? | back 24 B |
front 25 25) A large seaweed that floats freely on the surface of deep bodies
of water would be expected to have which of the following? C) true roots | back 25 B |
front 26 26) Reinforced, threadlike pseudopods that can perform phagocytosis
are generally characteristic of ________. C) dinoflagellates | back 26 A |
front 27 27) A porous test (shell) of calcium carbonate, through which
pseudopodia protrude, is characteristic of ________. C) ciliates | back 27 B |
front 28 28) You are given the task of designing an aquatic protist that is a
primary producer. It cannot swim on its own, yet must stay in well-lit
surface waters. It must be resistant to physical damage from wave
action. It should be most similar to a(n) ________. B) dinoflagellate | back 28 A |
front 29 29) A gelatinous seaweed that grows in shallow, cold water and
undergoes heteromorphic alternation of generations is most probably
what type of alga? C) brown | back 29 C |
front 30 30) You are given four test tubes, each containing an unknown protist, and your task is to read the following description and match these four protists to the correct test tube. When light, especially red and blue light, is shone on the tubes, oxygen bubbles accumulate on the inside of test tubes 1 and 2. Chemical analysis of test tube 1 indicates the presence of a chemical that is toxic to fish and humans. Chemical analysis of test tube 2 indicates the presence of substantial amounts of silica. Microscopic analysis of organisms in test tubes 1, 3, and 4 reveals the presence of permanent, membrane-bounded sacs just under the plasma membrane. Microscopic analysis of organisms in test tube 3 reveals the presence of an apicoplast in each. Microscopic analysis of the contents in test tube 4 reveals the presence of one large nucleus and one small nucleus in each organism. Test tube 3 contains ________. A) Paramecium C) Entamoeba D) Plasmodium | back 30 D |
front 31 31) You are given four test tubes, each containing an unknown protist, and your task is to read the following description and match these four protists to the correct test tube. When light, especially red and blue light, is shone on the tubes, oxygen bubbles accumulate on the inside of test tubes 1 and 2. Chemical analysis of test tube 1 indicates the presence of a chemical that is toxic to fish and humans. Chemical analysis of test tube 2 indicates the presence of substantial amounts of silica. Microscopic analysis of organisms in test tubes 1, 3, and 4 reveals the presence of permanent, membrane-bounded sacs just under the plasma membrane. Microscopic analysis of organisms in test tube 3 reveals the presence of an apicoplast in each. Microscopic analysis of the contents in test tube 4 reveals the presence of one large nucleus and one small nucleus in each organism. Test tube 4 contains ________. A) Paramecium C) Entamoeba D) Plasmodium | back 31 A |
front 32 32) You are given four test tubes, each containing an unknown protist, and your task is to read the following description and match these four protists to the correct test tube. When light, especially red and blue light, is shone on the tubes, oxygen bubbles accumulate on the inside of test tubes 1 and 2. Chemical analysis of test tube 1 indicates the presence of a chemical that is toxic to fish and humans. Chemical analysis of test tube 2 indicates the presence of substantial amounts of silica. Microscopic analysis of organisms in test tubes 1, 3, and 4 reveals the presence of permanent, membrane-bounded sacs just under the plasma membrane. Microscopic analysis of organisms in test tube 3 reveals the presence of an apicoplast in each. Microscopic analysis of the contents in test tube 4 reveals the presence of one large nucleus and one small nucleus in each organism. Test tube 1 contains ________. A) Paramecium C) Entamoeba D) Plasmodium | back 32 B |
front 33 33) You are given four test tubes, each containing an unknown protist, and your task is to read the following description and match these four protists to the correct test tube. When light, especially red and blue light, is shone on the tubes, oxygen bubbles accumulate on the inside of test tubes 1 and 2. Chemical analysis of test tube 1 indicates the presence of a chemical that is toxic to fish and humans. Chemical analysis of test tube 2 indicates the presence of substantial amounts of silica. Microscopic analysis of organisms in test tubes 1, 3, and 4 reveals the presence of permanent, membrane-bounded sacs just under the plasma membrane. Microscopic analysis of organisms in test tube 3 reveals the presence of an apicoplast in each. Microscopic analysis of the contents in test tube 4 reveals the presence of one large nucleus and one small nucleus in each organism. Test tube 2 contains ________. A) Paramecium C) Entamoeba D) Triceratium (diatom) | back 33 D |
front 34 36) Use the following information to answer the question. Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. When within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P. bursaria gather at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P. bursaria provides its zoochlorellae with protection and motility. P. bursaria can lose its zoochlorellae in two ways: (1) if kept in darkness, the algae will die; and (2) if prey items (mostly bacteria) are absent from its habitat, P. bursaria will digest its zoochlorellae. Which term best describes the symbiotic relationship of well-fed P.
bursaria to their zoochlorellae? C) predatory | back 34 A |
front 35 37) Use the following information to answer the question. Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. When within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P. bursaria gather at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P. bursaria provides its zoochlorellae with protection and motility. P. bursaria can lose its zoochlorellae in two ways: (1) if kept in darkness, the algae will die; and (2) if prey items (mostly bacteria) are absent from its habitat, P. bursaria will digest its zoochlorellae. The motility that permits P. bursaria to move toward a light source is provided by ________. A) pseudopods D) contractile vacuoles | back 35 C |
front 36 38) Use the following information to answer the question. Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. When within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P. bursaria gather at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P. bursaria provides its zoochlorellae with protection and motility. P. bursaria can lose its zoochlorellae in two ways: (1) if kept in darkness, the algae will die; and (2) if prey items (mostly bacteria) are absent from its habitat, P. bursaria will digest its zoochlorellae. A P. bursaria cell that has lost its zoochlorellae is said to be aposymbiotic. It might be able to replenish its contingent of zoochlorellae by ingesting them without subsequently digesting them. Which of the following situations would be most favorable to the reestablishment of resident zoochlorellae, assuming compatible Chlorella are present in P. bursaria's habitat? A) abundant light, no bacterial prey C) no light, no bacterial prey | back 36 B |
front 37 39) A P. bursaria cell that has lost its zoochlorellae is aposymbiotic. If aposymbiotic cells have population growth rates the same as those of healthy, zoochlorella-containing P. bursaria in well-lit environments with plenty of prey items, then such an observation would be consistent with which type of relationship? A) parasitic | back 37 B |
front 38 40) Use the following information to answer the question. Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. When within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P. bursaria gather at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P. bursaria provides its zoochlorellae with protection and motility. P. bursaria can lose its zoochlorellae in two ways: (1) if kept in darkness, the algae will die; and (2) if prey items (mostly bacteria) are absent from its habitat, P. bursaria will digest its zoochlorellae. Theoretically, P. bursaria can obtain zoochlorellae either vertically (via the asexual reproduction of its mother cell) or horizontally (by ingesting free-living Chlorella from its habitat). Consider a P. bursaria cell containing zoochlorellae but whose habitat lacks free-living Chlorella. If this cell subsequently undergoes many generations of asexual reproduction, if all of its daughter cells contain roughly the same number of zoochlorellae as it had originally contained, and if the zoochlorellae are all haploid and identical in appearance, then which statement is accurate? The zoochlorellae ________. A) also reproduced asexually, at an increasing rate over
time | back 38 C |
front 39 41) Use the following information to answer the question. Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. When within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P. bursaria gather at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P. bursaria provides its zoochlorellae with protection and motility. P. bursaria can lose its zoochlorellae in two ways: (1) if kept in darkness, the algae will die; and (2) if prey items (mostly bacteria) are absent from its habitat, P. bursaria will digest its zoochlorellae. Which process in Paramecium results in genetic recombination but no
increase in population size? C) conjugation | back 39 C |
front 40 45) Use the following information to answer the question(s) below. Paulinella chromatophora is one of the few cercozoans that is autotrophic, carrying out aerobic photosynthesis with its two elongated "chromatophores." The chromatophores are contained within vesicles of the host cell, and each is derived from a cyanobacterium, though not the same type of cyanobacterium that gave rise to the chloroplasts of algae and plants. P. chromatophora secretes around itself a test, or case, of plates
made of silica. Which of the following is another rhizarian that would
be in competition with P. chromatophora for the silica needed to make
these plates, assuming limited quantities of silica in the
environment? B) foraminiferans | back 40 A |
front 41 46) Including the membrane of the surrounding vesicle, how many
phospholipid (not lipopolysaccharide) bilayers should be found around
each P. chromatophora's chromatophore, and which one of these bilayers
should have photosystems embedded in it? | back 41 A |
front 42 47) Which of the following results would be most important in
determining whether P. chromatophora's chromatophore is still an
endosymbiont, or is an organelle, as the term chromatophore
implies? B) if the chromatophore is less fit without the host cercozoan than
with it D) if there has been movement of genes from the chromatophore genome to the nuclear genome, such that these genes are no longer present in the chromatophore genome | back 42 D |
front 43 48) The genome of modern chloroplasts is roughly 50% the size of the genome of the cyanobacterium from which it is thought to have been derived. In comparison, the genome of P. chromatophora's chromatophore is only slightly reduced relative to the size of the genome of the cyanobacterium from which it is thought to have been derived. What is a valid hypothesis that can be drawn from this comparison? A) Lytic phage infections have targeted the chloroplast genome more
often than the P. chromatophora genome. C) The genome of the chloroplast ancestor contained many more
introns that could be lost without harm compared to the
chromatophore's genome. | back 43 B |
front 44 49) A biologist discovers an alga that is marine, multicellular, and
lives at a depth reached only by blue light. This alga is most likely
a type of ________. C) green algae | back 44 A |
front 45 50) ________ is an important group of protists that produce ________,
a substance useful to humans. C) Diatoms; enzymes that digest cellulose | back 45 D |
front 46 51) The fact that amoebas are not monophyletic demonstrates that
________. | back 46 B |
front 47 52) SAR is a group defined by DNA similarities. This grouping represents ________. A) a paraphyletic group D) a demonstration that DNA similarities cannot reveal evolutionary history | back 47 B |
front 48 53) Predict the most likely outcome of fertilizing areas of ocean
with iron. D) a decrease in slime mold populations and thus a decrease in decomposition rates | back 48 C |
front 49 54) Green algae differ from land plants in that many green algae ________. A) are unicellular D) have cell walls containing cellulose | back 49 A |
front 50 55) You are given the task of designing an aerobic, mixotrophic
protist that can perform photosynthesis in fairly deep water (for
example, 250 meters deep) and can also crawl about and engulf small
particles. With which two of the following structures would you
provide your protist? | back 50 C |
front 51 56) Similar to most amoebozoans, the forams and the radiolarians also
have pseudopods, as do some of the white blood cells of animals
(monocytes). If one were to erect a taxon that included all organisms
that have cells with pseudopods, the taxon would ________. B) be paraphyletic | back 51 A |
front 52 57) Which of the following groups is matched with a correct anatomical feature? A) foraminifera → silicon-rich tests D) brown algae → blade | back 52 D |
front 53 58) Evidence that supports placing green algae and plants in the same
phylogenetic group includes ________. C) similarities in cell wall and membrane structure | back 53 B |
front 54 59) Many chlorophytes are unicellular, but others are bigger and more
complex. The fact that increased size and complexity evolved in
different ways indicates ________. C) the chlorophyte group is the protist group most closely related to plants D) the chlorophyte group contained extensive genetic variability | back 54 D |
front 55 60) Previously recognized similarities that seemed to connect slime
molds and fungi are now considered to be ________. C) variations of common ancestral traits | back 55 B |
front 56 61) Branching points at the root of the eukaryotic phylogenetic tree ________. A) reveal that unikonts are derived from the SAR clade D) are presently unclear | back 56 D |
front 57 62) Super cells characteristic of plasmodial slime molds result when
which one of the following common cellular processes does not
occur? C) aerobic metabolism | back 57 B |
front 58 63) Which of the following is responsible for nearly 100,000 human
deaths worldwide every year? C) plasmodial slime molds | back 58 A |
front 59 64) In order to determine the "root" of the eukaryote
phylogenetic tree, scientists should ________. C) sequence more nuclear genes in green algae and plants | back 59 D |
front 60 67) Imagine that some members of an aquatic species of motile, photosynthetic protists evolve to become parasitic to fish. They gain the ability to live in the fish gut, absorbing nutrients as the fish digests food. Over time, which of the following phenotypic changes would you expect to observe in this population of protists? A) loss of motility | back 60 B |
front 61 68) Use the following information to answer the question. Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. When within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P. bursaria gather at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P. bursaria provides its zoochlorellae with protection and motility. P. bursaria can lose its zoochlorellae in two ways: (1) if kept in darkness, the algae will die; and (2) if prey items (mostly bacteria) are absent from its habitat, P. bursaria will digest its zoochlorellae. Which term most accurately describes the nutritional mode of healthy P. bursaria? A) photoautotroph D) mixotroph | back 61 D |
front 62 69) Living diatoms contain brownish plastids. If global warming causes blooms of diatoms in the surface waters of Earth's oceans, how might this be harmful to the animals that build coral reefs? A) The coral animals, which capture planktonic organisms, may be outcompeted by the diatoms. B) The coral animals' endosymbiotic dinoflagellates may get "shaded out" by the diatoms. C) The coral animals may die from overeating the plentiful diatoms with their cases of silica. D) The diatoms' photosynthetic output may over-oxygenate the water. | back 62 B |
front 63 70) Which of the following organisms is a producer? A) kinetoplastids D) ciliates | back 63 C |
front 64 71) Which of the following approaches would be most likely to cause
evolution of a drug- resistant strain of Plasmodium? C) widespread, frequent use of a single drug in patients suffering from malaria D) widespread use of anti-mosquito bed nets | back 64 C |
front 65 72) Which of the following statements is accurate with regard to the
observation that "income levels in countries hard hit by malaria
are 33% lower than in similar countries free of the
disease." B) This observation is an example of a correlation and therefore
causality cannot be inferred as confidently as if we have results from
a manipulated experiment. D) The observation demonstrates that correlations provide excellent indications of causality. | back 65 B |
front 66 73) Which of the following results would be most likely if a layer of
warm, light water caused by ocean surface warming blocks nutrient
upwelling? C) reduced populations of producers because they have access to
fewer nutrients | back 66 C |
front 67 1) Plastids that are surrounded by more than two membranes are evidence of A) evolution from mitochondria. D) secondary endosymbiosis. | back 67 D |
front 68 2) Biologists think that endosymbiosis gave rise to mitochondria before plastids partly because A) the products of photosynthesis could not be metabolized without mitochondrial enzymes. B) all eukaryotes have mitochondria (or their remnants), whereas many eukaryotes do not have plastids. C) mitochondrial DNA is less similar to prokaryotic DNA than is plastid DNA. D) without mitochondrial CO2 production, photosynthesis could not occur. | back 68 B |
front 69 3) Which group is incorrectly paired with its description? | back 69 B |
front 70 4) According to the phylogeny presented in this chapter, which
protists are in the same eukaryotic supergroup as plants? C) red algae | back 70 D |
front 71 5) In a life cycle with alternation of generations, multicellular haploid forms alternate with A) unicellular haploid forms. D) multicellular diploid forms. | back 71 D |