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108 Cards in this Set
- Front
- Back
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Earth probably formed about _____ years ago, and the oldest known living organisms date to _____ years ago.
A. 4.5 billion years ago ... 3.5 billion years ago B. 3.9 million years ago ... 2.0 billion years ago C. 6,000 years ago ... 6,000 years ago D. 10 billion years ago ... 4.5 billion years ago E. none of the above |
A. 4.5 billion years ago ... 3.5 billion years ago
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Spontaneous generation _____.
A. is the belief that living organisms arise from nonliving matter B. was proven by Louis Pasteur C. is also called biogenesis D. occurs when maggots appear in rotting meat E. states that all life comes from existing life |
A. is the belief that living organisms arise from nonliving matter
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Experiments in which electricity was discharged into a vessel containing hydrogen gas, water vapor, methane, and ammonia were conducted by _____.
A. Miller and Urey B. Watson and Crick C. Darwin D. Meselson and Stahl E. Pasteur |
A. Miller and Urey
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In cells, RNAs that can act like enzymes are called _____.
A. ribozymes B. Golgi bodies C. lysosomes D. peroxisomes E. vacuoles |
A. ribozymes
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Which of the following are the two main branches of prokaryotic evolution?
A. bacteria and archaea B. fungi and protists C. plants and animals D. viruses and bacteria E. autotrophs and heterotrophs |
A. bacteria and archaea
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E. coli bacteria, which live in human intestines, are shaped like tiny, straight sausages. They are _____.
A. bacilli B. endospores C. spirochetes D. cocci E. pseudopodia |
A. bacilli
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All living organisms can be divided into four nutritional classes based on how they obtain which two resources?
A. carbon and energy B. oxygen and nitrogen C. carbon and oxygen D. nitrogen and carbon E. hydrogen and energy |
C. carbon and oxygen
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The bacterium Bacillus thuringensis can withstand heat, dryness, and toxic chemicals that would kill most other bacteria. This indicates that it is probably able to form _____.
A. pseudopodia B. endotoxins C. endospores D. exotoxins E. cellulose |
C. endospores
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Bacteria that live around deep-sea hot-water vents obtain energy by oxidizing inorganic hydrogen sulfide belched out by the vents. They use this energy to build organic molecules from carbon obtained from the carbon dioxide in the seawater. These bacteria are _____.
A. photoheterotrophs B. chemoautotrophs C. photoautotrophs D. chemoheterotrophs E. none of the above |
B. chemoautotrophs
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Which of these human diseases does an apicomplexan protozoan cause?
A. malaria B. sleeping sickness C. Lyme disease D. tuberculosis (TB) E. giardiasis |
A. malaria
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The endosymbiotic theory states that _____; one piece of evidence supporting this theory is the fact that _____.
A. the first hereditary material was RNA ... mitochondria and chloroplasts have heredity based on RNA B. the genomes of complex animals came in part from the genomes of invading pathogens ... the human genome contains the complete genomes of 120 viruses and 10 bacteria C. mitochondria and chloroplasts originated as ingested prokaryotes ... mitochondria and chloroplasts have their own DNA D. over time, parasites evolve to resemble their hosts ... the DNA of human parasites contains segments of human DNA E. none of the above |
C. mitochondria and chloroplasts originated as ingested prokaryotes ... mitochondria and chloroplasts have their own DNA
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While peering through the microscope, a classmate of yours said, "I know that this thing is supposed to be a ciliate, a flagellate, or an amoeba, but I can't figure out which." You replied, "That's easy. _____."
A. Watch how it moves. B. See how big it is. C. All you have to do is see whether it has a nucleus. D. Watch and see what it eats. E. Look at its chloroplasts. |
A. Watch how it moves.
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A sign on the beach states, "Beach Closed. Red Tide." The organisms interfering with your use of this beach are _____.
A. amoebas B. ciliates C. diatoms D. dinoflagellates E. species of red algae |
D. dinoflagellates
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Which of the following organisms are characterized by having glassy cell walls that contain silica?
A. diatoms B. amoebas C. dinoflagellates D. slime molds E. apicomplexans |
A. diatoms
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Which of the following groups of protists is classified into these three groups: brown algae, green algae, and red algae?
A. seaweeds B. diatoms C. slime molds D. dinoflagellates E. ciliates |
A. seaweeds
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Which of these events occurred earliest in the history of Earth?
A. formation of oxygen B. first humans C. colonization of land by fungi D. evolution of animals E. origin of multicellularity |
A. formation of oxygen
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Which of these events occurred most recently in the history of Earth?
A. formation of oxygen B. first humans C. colonization of land by fungi D. evolution of animals E. origin of multicellularity |
B. first humans
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Which of these events occurred during the Paleozoic?
A. origin of Earth B. colonization of land by plants C. origin of eukaryotes D. origin of multicellularity E. first humans |
B. colonization of land by plants
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Bacteria and archaea are examples of _____.
A. algae B. prokaryotes C. viruses D. protozoans E. fungi |
B. prokaryotes
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Where in a prokaryotic cell is the genetic material located?
A. nucleus B. nucleoid region C. flagellum D. cell wall E. ribosomes |
B. nucleoid region
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Anabena is classified as a(n) _____.
A. spirochete B. extreme halophile C. methanogen D. cyanobacterium |
D. cyanobacterium
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Which of these prokaryotes is photosynthetic?
A. Sulfobolus acidocaldarius B. Halobacterium halobium C. Anabena D. Proteus vulgaris E. Methanosarcina barkeri |
C. Anabena
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Which of the following was probably not present in large amounts in the atmosphere at the time life is thought to have originated?
A. water (H2O) B. nitrogen (N2) C. carbon monoxide (CO) D. oxygen (O2) E. carbon dioxide (CO2) |
D. oxygen (O2)
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Spontaneous generation _____.
A. is a theory most modern biologists believe B. occurs in the tropical rain forest today C. is a theory proven by Louis Pasteur D. is a theory proven by Charles Darwin E. is a theory that states that life arises from nonliving matter |
E. is a theory that states that life arises from nonliving matter
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Which of the following is thought to have been the first step in the origin of life?
A. cooperation among molecules B. formation of polypeptide spheres C. formation of organic monomers D. replication of primitive genes E. formation of organic polymers |
C. formation of organic monomers
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The early atmosphere on Earth is thought to have had very little, if any, _____.
A. CH4 B. CO2 C. O2 D. H2O E. N2 |
C. O2
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In their experiment on the origin of organic compounds, which of the following gases did Urey and Miller use to simulate Earth's early atmosphere?
A. H2O only B. H2O and CH4 only C. H2O, CH4, and H2 only D. H2O, CH4, H2, and NH3 E. H2O, CH4, H2, NH3, and O2 |
D. H2O, CH4, H2, and NH3
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The Urey and Miller experiments (and subsequent, similar experiments) showed that _____.
A. life can be created in a test tube B. long chains of DNA can form under abiotic conditions C. simple organic molecules can form spontaneously under conditions like those thought to prevail early in Earth's history D. the earliest life forms introduced large amounts of oxygen into the atmosphere E. the "concentration gap" probably prevented simple organic molecules from polymerizing |
C. simple organic molecules can form spontaneously under conditions like those thought to prevail early in Earth's history
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Clay particles may have played an important role in the origin of life because _____.
A. growing bacterial colonies can leave clay deposits B. early life-forms probably ate clay C. clay particles are a suitable surface for the formation of polymers from monomers D. clay is an important abiotic nutrient reservoir E. clay provided shelter from UV radiation and ocean currents and provided a protected environment in which the first organisms evolved |
C. clay particles are a suitable surface for the formation of polymers from monomers
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It has been suggested that the first self-replicating molecules were _____.
A. DNA B. phospholipids C. viruses D. true proteins E. RNA |
E. RNA
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The earliest cells were most likely _____.
A. eukaryotic B. prokaryotic C. neurotic D. multicellular E. animals |
B. prokaryotic
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The most abundant group of organisms on Earth is the _____.
A. algae B. protozoans C. protists D. eukaryotes E. prokaryotes |
E. prokaryotes
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Prokaryotes called _____ are similar in many ways to eukaryotic organisms.
A. archaea B. bacteria C. protozoans D. bacilli E. dinoflagellates |
A. archaea
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A streptobacillus kind of prokaryote _____.
A. occurs only as isolated cells B. occurs primarily as large packets of cells adhering together in a cluster. C. consists of rod-shaped cells arranged in chains D. contains mostly spherical cells E. is an extremophile |
C. consists of rod-shaped cells arranged in chains
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In an experiment, a microbiologist put equal numbers of each of the following organisms into a flask of sterile broth consisting mostly of sugar and a few amino acids. She then placed the flask in the dark. Which of the organisms would be best able to survive?
A. chemoheterotrophic prokaryotes B. dinoflagellates C. diatoms D. thermophilic prokaryotes E. green algae |
A. chemoheterotrophic prokaryotes
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Prokaryotes that use light for their energy source and CO2 for their carbon source are called _____.
A. photoautotrophs B. photoheterotrophs C. chemoautotrophs D. chemoheterotrophs E. photochemoheterotrophs |
A. photoautotrophs
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Prokaryotes found inhabiting the Great Salt Lake would be the _____.
A. apicomplexans B. extreme halophiles C. acidothermophiles D. methanogens E. extreme thermophiles |
B. extreme halophiles
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Methanogens, extreme halophiles, and extreme thermophiles are examples of _____.
A. viruses B. archaea C. endosymbiotic bacteria D. algae E. protozoans |
B. archaea
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Which of the following would most likely spoil salted fish?
A. Escherichia coli B. a halophile C. an endospore-forming bacteria D. a thermophile E. a methanogen. |
B. a halophile
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The bacteria that cause tetanus can be killed only by prolonged heating at temperatures considerably above boiling. This suggests that tetanus bacteria _____.
A. have cell walls B. protect themselves by secreting antibiotics C. secrete endotoxins D. are autotrophic E. produce endospores |
E. produce endospores
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Which one of the following is a human disease caused by a bacterium?
A. AIDS B. common cold C. food poisoning D. athlete's foot E. malaria |
C. food poisoning
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You have been asked to participate in the cleanup of an old mining site. You dislike the idea of handling poisonous acidic soils, so you volunteer to culture the bacterium Thiobacillus. The aspect of the cleanup that you are participating in is _____.
A. biodiversity maintenance B. preservationism C. bioremediation D. biophilia E. spontaneous generation |
C. bioremediation
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Prokaryotes copy themselves and divide in a process known as _____.
A. spontaneous generation B. meiosis C. binary fission D. evolution E. abiotic synthesis |
C. binary fission
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Which of the following organelles were likely generated through endosymbiosis?
A. centrioles and plasmodesmata B. ribosomes and nucleoli C. Golgi apparatus and endoplasmic reticulum D. lysosomes and vacuoles E. mitochondria and chloroplasts |
E. mitochondria and chloroplasts
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Eukaryotic cells probably arose through _____.
A. colonial aggregations of bacteria B. associations between different prokaryotes C. colonial aggregations of protists D. direct descent from pre-cells E. incomplete bacterial fission |
B. associations between different prokaryotes
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Protists are a diverse group of organisms that includes _____.
A. plants B. algae C. bacteria D. fungi E. animals |
B. algae
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In general, how do algae and protozoans differ?
A. Protozoans can move and algae cannot. B. Algae are free-living, and protozoans are parasitic. C. Protozoans are autotrophic, and algae are heterotrophic. D. Algae are photosynthetic, and almost all protozoans are heterotrophic. E. Algae are prokaryotes, and protozoans are eukaryotes. |
D. Algae are photosynthetic, and almost all protozoans are heterotrophic.
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Which of these groups includes parasitic unicellular organisms with a complex of organelles specialized for penetrating host cells and tissues?
A. diatoms B. dinoflagellates C. flagellates D. ciliates E. apicomplexans |
E. apicomplexans
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A student is looking at a protozoan under the microscope. "I know it's supposed to be a ciliate, a flagellate, or an amoeba, but how am I supposed to know which it is?" she complains to her lab partner. "Easy," her partner says. "Just _____.
A. watch and see what it eats B. see whether it has a nucleus C. watch how it moves D. measure how big it is E. look at its chloroplasts |
C. watch how it moves
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Consider the following kinds of organisms: dinoflagellates and ciliates. Both of these organisms belong to which one of the following groups?
A. protists B. bacteria C. algae D. prokaryotes E. archaea |
A. protists
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Which of the following are protozoans?
A. diatoms, flagellates, amoebas, and ciliates B. apicomplexans, flagellates, amoebas, and ciliates C. amoebas, spirochetes, ciliates, and flagellates D. flagellates, ciliates, spirochetes, and apicomplexans E. ciliates, diatoms, amoebas, and apicomplexans |
B. apicomplexans, flagellates, amoebas, and ciliates
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The cells of cellular slime molds bear a resemblance to _____ cells.
A. flagellated B. diatom C. ciliated D. dinoflagellated E. amoeboid |
E. amoeboid
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In lab class a plasmodial slime mold is used as a demonstration organism. One of the students does not understand why the plasmodium is not considered multicellular. How would you explain it to her?
A. This mass of cytoplasm is undivided by membranes and contains many nuclei; therefore, it is not technically multicellular. B. The distinct cells that make up the mass of cytoplasm do not cooperate, so they do not represent a truly multicellular organism. C. Plasmodial slime molds are not able to reproduce sexually, so therefore they are not truly multicellular. D. Only plants and animals are multicellular. E. The nuclei found in the cytoplasm of a plasmodial slime mold are diploid. |
A. This mass of cytoplasm is undivided by membranes and contains many nuclei; therefore, it is not technically multicellular.
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Which organisms are capable of producing a "red tide"?
A. dinoflagellates B. diatoms C. plasmodial slime molds D. apicomplexans E. none of the above |
A. dinoflagellates
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The algal groups most commonly found in freshwater ecosystems are _____.
A. brown algae B. red algae C. green algae D. spirochetes E. slime molds |
C. green algae
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Which of these groups includes unicellular organisms with unique overlapping cell walls?
A. diatoms B. dinoflagellates C. flagellates D. ciliates E. apicomplexans |
A. diatoms
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Which of the following groups of algae are most closely related to higher plants?
A. brown algae B. multicellular green algae C. diatoms D. dinoflagellates E. ciliates |
B. multicellular green algae
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Groups of seaweeds can generally be distinguished on the basis of _____.
A. color B. size C. whether they are multicellular or unicellular D. whether they have true leaves, stems, and roots E. whether they are autotrophic or heterotrophic |
A. color
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Which of the following colonial organisms demonstrate the evolutionary link between unicellular and multicellular life?
A. bacteria B. diatoms C. Volvox D. amoebas E. flagellates |
C. Volvox
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Eukaryotes arose about ______ years after the first prokaryotes.
A) 3.0 million B) 1.0 billion C) 2.0 billion D) 3.0 billion E) 4.0 billion |
C) 2.0 billion
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Large amounts of oxygen gas appeared in Earthʹs atmosphere about ______ years ago.
A) 200 million B) 1.7 billion C) 2.0 billion D) 2.5 billion E) 4.5 billion |
D) 2.5 billion
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Animal life underwent its greatest diversification during the ______, which began about ______ million years ago.
A) Permian . . . 290 B) Cambrian . . . 570 C) Carboniferous . . . 363 D) Cenozoic . . . 65 E) Mesozoic . . . 245 |
B) Cambrian . . . 570
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Which kingdom(s) was(were) the first to colonize land?
A) Monera B) Plantae and Fungi C) Monera and Protista D) Archaea E) Protista and Fungi |
B) Plantae and Fungi
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Land was first colonized about ______ years ago.
A) 100 million B) 475 million C) 570 billion D) 1.7 billion E) 2.0 billion |
B) 475 million
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The abiotic origin of life is referred to as ______.
A) polymerization B) diversification C) spontaneous generation D) endosymbiosis E) biogenesis |
C) spontaneous generation
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The absence of ______ in the primitive atmosphere was essential to the origin of life on Earth.
A) N2 B) CO2 C) CH4 D) NH3 E) O2 |
E) O2
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What was the first stage of the process that led to the abiotic origin of life?
A) abiotic synthesis of monomers, such as amino acids and nucleotides B) origin of self-replicating molecules C) abiotic synthesis of ribozymes D) abiotic synthesis of polymers E) abiotic formation of pre-cells |
A) abiotic synthesis of monomers, such as amino acids and nucleotides
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Whose seminal experiments demonstrated that, given the conditions on the primitive Earth, life could arise spontaneously?
A) Miller and Urey B) Darwin C) Watson D) Pauling E) Margulis |
A) Miller and Urey
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Under what abiotic conditions can monomers spontaneously form polymers?
A) in the presence of oxygen gas B) when ribozymes are present to catalyze the reaction C) with the addition of water D) by biogenesis E) when water evaporates from a hot surface |
E) when water evaporates from a hot surface
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Why is RNA thought to have been the first genetic material?
A) RNA is structurally simpler than DNA. B) RNA codes for fewer amino acids than does DNA. C) RNA has been found on meteorites; DNA has not. D) RNA is capable of self-replication; DNA is not. E) Primitive organisms, such as some viruses, have RNA as their genetic material. |
D) RNA is capable of self-replication; DNA is not.
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RNAs that can act as enzymes are called ______.
A) ribozymes B) chromosomes C) ATPs D) lysosomes E) prokaryotes |
A) ribozymes
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Variation among pre-cells was due to ______.
A) genetic drift B) artificial selection C) natural selection D) the bottleneck effect E) mutation |
E) mutation
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Which prokaryotic group is most closely related to eukaryotes?
A) domain Bacteria B) kingdom Protista C) domain Archaea D) domain Monera E) kingdom Monera |
C) domain Archaea
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The prokaryotic group that tends to inhabit extreme environments belongs to the ______.
A) kingdom Monera B) kingdom Protista C) domain Archaea D) domain Monera E) domain Bacteria |
C) domain Archaea
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The suffix ʺ-phileʺ means ______.
A) hater B) extremist C) adapted to D) gas producer E) lover |
E) lover
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Which of the following are primarily responsible for an unfortunate side effect of eating beans?
A) forams B) halophiles C) dinoflagellates D) methanogens E) exotoxins |
D) methanogens
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Bacteria that occur in grapelike clusters are ______.
A) spirochetes B) streptococci C) bacilli D) spirilla E) staphylococci |
E) staphylococci
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Bacilli are ______ prokaryotes.
A) spherical B) comma-shaped C) cone-shaped D) rod-shaped E) spiral |
D) rod-shaped
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Which of the following would likely be the most difficult to kill were you to can your own food?
A) microspores B) endospores C) sporophylls D) sporophytes E) megaspores |
B) endospores
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Prokaryotes reproduce by means of ______.
A) mitosis B) binary fission C) budding D) the cell cycle E) meiosis |
B) binary fission
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Under ideal conditions, prokaryotes are capable of reproducing at a(n) ______ rate.
A) hypergeometric B) exponential C) infinite D) inverse E) arithmetic |
B) exponential
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You discover a prokaryote that can make its own food in the absence of light. Nutritionally, you would classify this prokaryote as a ______.
A) chemoautotroph B) photoheterotroph C) decomposotroph D) photoautotroph E) chemoheterotroph |
A) chemoautotroph
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All prokaryotic and eukaryotic organisms that photosynthesize fit into which nutritional category?
A) chemoautotrophs B) heteroautotrophs C) photoheterotrophs D) photoautotrophs E) chemoheterotrophs |
D) photoautotrophs
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Which of the following include the two classes of poisons produced by pathogenic bacteria?
A) exotoxins and endotoxins B) prokaryotes and eukaryotes C) chemoautotrophs and chemoheterotrophs D) protozoans and fungi E) bacilli and cocci |
A) exotoxins and endotoxins
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You and a friend recently ate out together. Later, you both developed fevers and body aches. Which of the following is the likely cause of your misery?
A) a red tide B) an endotoxin C) bioremediation D) an apicomplexan E) an exotoxin |
B) an endotoxin
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In the soil, some ______ convert nitrogen to a form that can be used by plants.
A) protists B) animals C) protozoans D) prokaryotes E) fungi |
D) prokaryotes
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______ is an example of bioremediation.
A) An immune response to a typhus infection B) Cyanobacteria converting atmospheric nitrogen to a form that plants can use C) The use of an autoclave to kill endospores D) The use of Pseudomonas to help clean up oil spills E) A dinoflagellate bloom causing massive fish kills |
D) The use of Pseudomonas to help clean up oil spills
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The simplest eukaryotes are classified as ______.
A) archaea B) monerans C) bacteria D) seaweeds E) protists |
E) protists
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According to the theory of endosymbiosis, which organelles evolved from small prokaryotes that established residence within other, larger prokaryotes?
A) vacuoles and lysosomes B) Golgi apparatus and endoplasmic reticulum C) centrioles and ribosomes D) nucleoli and chromosomes E) mitochondria and chloroplasts |
E) mitochondria and chloroplasts
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Flagellates, amoebas, forams, apicomplexans, and ciliates are all what type of protist?
A) slime molds B) protozoans C) diatoms D) dinoflagellates E) seaweeds |
B) protozoans
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You discover a unicellular organism that moves by what appear to be pseudopodia. You conclude that this organism is ______.
A) either a type of amoeba or a type of slime mold B) a type of bacterium C) a type of alga D) a type of pathogen E) either a type of ciliate, or a type of amoeba, or a type of flagellate, or a type of apicomplexan |
A) either a type of amoeba or a type of slime mold
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Which protozoan group consists solely of parasitic forms? A) apicomplexans
B) cellular slime molds C) ciliates D) flagellates E) amoebas |
A) apicomplexans
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______ are cells that can function either independently or as a single unit.
A) Dinoflagellates B) Forams C) Seaweeds D) Amoebas E) Cellular slime molds |
E) Cellular slime molds
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Which of the following are most plantlike?
A) diatoms B) forams C) cellular slime molds D) green algae E) amoebas |
D) green algae
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______ are responsible for toxic red tides.
A) Plasmodial slime molds B) Dinoflagellates C) Apicomplexans D) Red algae E) Diatoms |
B) Dinoflagellates
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A photoautotrophic unicellular organism with a shell made of silica is most likely a(n) ______.
A) apicomplexan B) amoeba C) foram D) dinoflagellate E) diatom |
E) diatom
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Which of the following is most closely related to plants? A) Volvox
B) Giardia C) Thiobacillus D) Paramecium E) Plasmodium |
A) Volvox
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What accounts for the similarity between seaweeds and plants?
A) Plants are the ancestors of seaweeds. B) Convergent evolution caused their similarity. C) Both evolved from brown algae. D) Seaweeds are the ancestors of plants. E) Seaweeds are aquatic plants |
B) Convergent evolution caused their similarity.
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Which of the following has an organization that may be similar to an evolutionary stage between unicellularity and multicellularity?
A) Thiobacillus B) Volvox C) Amoeba D) Giardia E) Plasmodium |
B) Volvox
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46) This organism transmits the disease ______, which is caused by a(n) ______.(mosquito)
A) malaria . . . apicomplexan B) food poisoning . . . endotoxin C) toxic shock syndrome . . . exotoxin D) red tide . . . dinoflagellate E) dysentery . . . flagellate |
A) malaria . . . apicomplexan
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What type of protist is Plasmodium?
A) diatom B) slime mold C) dinoflagellate D) apicomplexan E) amoeba |
D) apicomplexan
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Why do so many children in developing countries die of malaria?
A) The costs of treatment and prevention are too high. B) They are more susceptible to the disease. C) There is no cure for malaria. D) Malaria is only found in developing countries today. E) Anopheles mosquitoes are only found in developing countries. |
A) The costs of treatment and prevention are too high.
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A vector is an organism that transfers a pathogen to a host. In the case of malaria, the vector(s) is(are) ______.
A) humans only B) humans and Anopheles mosquitoes C) Plasmodium only D) Anopheles mosquitoes only E) humans, Plasmodium, and Anopheles |
D) Anopheles mosquitoes only
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Which of these is arranged in the appropriate sequence from the earliest to the most recent?
A) origin of Earth, origin of prokaryotes, beginning of the accumulation of atmospheric oxygen, oldest eukaryotic cell fossils, origin of multicellular eukaryotes, colonization of land by plants and fungi, first humans B) origin of Earth, origin of prokaryotes, oldest eukaryotic cell fossils, beginning of the accumulation of atmospheric oxygen, origin of multicellular eukaryotes, colonization of land by plants and fungi, first humans C) origin of Earth, beginning of the accumulation of atmospheric oxygen, origin of prokaryotes, oldest eukaryotic cell fossils, origin of multicellular eukaryotes, colonization of land by plants and fungi, first humans D) origin of Earth, origin of prokaryotes, oldest eukaryotic cell fossils, origin of multicellular organisms, colonization of land by plants and fungi, beginning of the accumulation of atmospheric oxygen, first humans E) origin of prokaryotes, origin of Earth, beginning of the accumulation of atmospheric oxygen, oldest eukaryotic cell fossils, origin of multicellular eukaryotes, colonization of land by plants and fungi, first humans |
A) origin of Earth, origin of prokaryotes, beginning of the accumulation of atmospheric oxygen, oldest eukaryotic cell fossils, origin of multicellular eukaryotes, colonization of land by plants and fungi, first humans
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In a prokaryotic cell, the ______ is(are) the site of protein synthesis.
A) ribosomes B) cell wall C) pili D) capsule E) nucleoid region |
A) ribosomes
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What name is given to the rigid structure that surrounds and supports a prokaryotic cell?
A) capsule B) pili C) cell wall D) nucleoid region E) plasma membrane |
C) cell wall
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What name is given to the structure that acts as a selective barrier to the movement of substances into and out of a prokaryotic cell?
A) nucleoid region B) pili C) flagellum D) plasma membrane E) ribosome |
D) plasma membrane
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Members of the ______ built stomatolites.
A) extreme halophiles B) chlamydias C) archaea D) cyanobacteria E) methanogens |
D) cyanobacteria
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