Biology 170 Spring 2024 Test 1
30 Questions
4 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What has substantially increased in concentration in the last 200 years?

  • Oxygen
  • Carbon dioxide (correct)
  • Nitrogen
  • Argon
  • What are the Burgess Shales significant for?

  • They contain fossils of the first primates.
  • They contain diverse fossils of many multicellular organisms during the Cambrian Explosion (correct)
  • They are a rich source of oil and gas
  • They capture the Great Oxygenation Event
  • What event led to the formation of photosynthetic eukaryotes?

  • Endosymbiotic event between Cyanobacteria and eukaryotes (correct)
  • Endosymbiotic event between Eukaryotes and Archaea
  • Endosymbiotic event between Alphaproteobacteria and Archaea
  • Endosymbiotic event between Cyanobacteria and alphaproteobacteria
  • What is the primary cause of mass extinction events?

    <p>All of the above (D)</p> Signup and view all the answers

    Which group of organisms is primarily responsible for oxygenation of our planet?

    <p>Cyanobacteria (C)</p> Signup and view all the answers

    What is the significance of the Cambrian Explosion?

    <p>It is a period of rapid diversification of multicellular life (D)</p> Signup and view all the answers

    What does the photograph show, according to the text?

    <p>All of the above (D)</p> Signup and view all the answers

    What is a characteristic of most life on Earth?

    <p>It is microscopic (D)</p> Signup and view all the answers

    What is a unique feature of the cyanobacterium Prochlorococcus?

    <p>It is one of the smallest photosynthetic organisms on Earth (D)</p> Signup and view all the answers

    How do Influenza viruses store their genetic material?

    <p>Single-stranded RNA (B)</p> Signup and view all the answers

    Why are Influenza viruses so dangerous?

    <p>They can jump between many different hosts and have genetic reassortment (A)</p> Signup and view all the answers

    What is a characteristic of microbes?

    <p>They live on virtually every place on Earth (A)</p> Signup and view all the answers

    What are the two proteins responsible for an Influenza virus entering a host cell?

    <p>Hemagglutinin and Neuraminidase (C)</p> Signup and view all the answers

    What percentage of all species on Earth are mammals?

    <p>1% (B)</p> Signup and view all the answers

    What is the main reason why DNA is a better information storage molecule than RNA?

    <p>DNA is more stable than RNA (C)</p> Signup and view all the answers

    What is one function of gut microbes?

    <p>They manufacture vitamins that we are unable to make (A)</p> Signup and view all the answers

    What is true about pathogenic microorganisms?

    <p>Many diverse lineages of the domain Bacteria have pathogenic members (B)</p> Signup and view all the answers

    What is the term used for the independent evolution of similar traits?

    <p>Convergent evolution (C)</p> Signup and view all the answers

    What is the source of energy for the bacterium Thermocrinis ruber?

    <p>Hydrogen gas (H2) (D)</p> Signup and view all the answers

    What is the role of oxygen in the energy metabolism of Thermocrinis ruber?

    <p>It is used as a reactant (A)</p> Signup and view all the answers

    What is the source of energy for the bacterium Desulfotomaculum?

    <p>Benzene (a component of gasoline) (C)</p> Signup and view all the answers

    What is the role of sulfate in the energy metabolism of Desulfotomaculum?

    <p>It is used as a reactant (A)</p> Signup and view all the answers

    What is a characteristic of phototrophs?

    <p>They use different kinds of chlorophylls (C)</p> Signup and view all the answers

    What is a characteristic of life at near boiling temperatures in Yellowstone National Park?

    <p>The communities contain a small number of different kinds of bacteria (C)</p> Signup and view all the answers

    Based on the phylogeny, what is the classification of reptiles (Reptilia)?

    <p>Monophyletic (A)</p> Signup and view all the answers

    What is the classification of the 'endotherms' group (Mammalia and Aves)?

    <p>Monophyletic (A)</p> Signup and view all the answers

    Which process involves the acquisition of new DNA by an organism from a donor?

    <p>Horizontal gene transfer (A)</p> Signup and view all the answers

    What is true about viruses?

    <p>Viruses greatly outnumber cellular organisms (B)</p> Signup and view all the answers

    What is the term for an RNA that can catalyze a chemical reaction?

    <p>Ribozyme (B)</p> Signup and view all the answers

    What is true about autotrophs?

    <p>All autotrophs are phototrophs (A)</p> Signup and view all the answers

    Flashcards

    Cambrian Explosion

    A period of rapid diversification of multicellular life, particularly marked by the appearance of new body plans and major animal phyla in the fossil record.

    Photoautotrophs

    A group of organisms that obtain energy from sunlight and use carbon dioxide as their primary carbon source.

    Horizontal gene transfer

    The process of acquiring new DNA from a donor organism, often a different species.

    Convergent evolution

    The process in which different species evolve similar traits independently due to similar environmental pressures.

    Signup and view all the flashcards

    Horizontal Gene Transfer

    The process of acquiring new DNA from a donor organism, often a different species.

    Signup and view all the flashcards

    Ribozyme

    A type of RNA molecule that can catalyze (speed up) chemical reactions, like enzymes.

    Signup and view all the flashcards

    Horizontal Gene Transfer

    The process of acquiring new DNA from a donor organism, often a different species. Think of genes being passed sideways, not just from parent to offspring.

    Signup and view all the flashcards

    Photoautotroph

    An organism that obtains its energy from sunlight and uses carbon dioxide as its primary carbon source.

    Signup and view all the flashcards

    Autotrophs

    Organisms that can synthesize their own food from inorganic sources, typically through photosynthesis or chemosynthesis.

    Signup and view all the flashcards

    Phototrophs

    A group of organisms characterized by being able to use sunlight for energy and carbon dioxide to build their own food.

    Signup and view all the flashcards

    Microbes

    Microscopic organisms that live in virtually every habitat on Earth, including the human body.

    Signup and view all the flashcards

    Viruses

    Viruses that infect and replicate inside host cells.

    Signup and view all the flashcards

    Endosymbiotic event

    The major event in the evolution of life that led to the first photosynthetic eukaryotes, involving the engulfment of a cyanobacterium by a eukaryotic cell.

    Signup and view all the flashcards

    Lateral Gene Transfer

    The process by which prokaryotes (bacteria and archaea) obtain genetic material from other organisms.

    Signup and view all the flashcards

    Chemoautotrophs

    A group of organisms that obtain energy from the oxidation of inorganic compounds.

    Signup and view all the flashcards

    Ribozyme

    A type of RNA molecule that can act as an enzyme, catalyzing (speeding up) chemical reactions.

    Signup and view all the flashcards

    Heterotrophs

    Organisms that cannot produce their own food and rely on consuming other organisms for energy and nutrients.

    Signup and view all the flashcards

    Chemoautotrophs

    A group of organisms characterized by their ability to obtain energy from the oxidation of inorganic compounds. Think of these organisms using chemicals for energy, not sunlight.

    Signup and view all the flashcards

    Chemoautotrophs

    A group of organisms characterized by their ability to obtain energy from the oxidation of inorganic compounds. Think of these organisms using chemicals for energy, not sunlight.

    Signup and view all the flashcards

    Chemoautotrophs

    A group of organisms that obtain energy from the oxidation of inorganic compounds.

    Signup and view all the flashcards

    Chemoautotrophs

    A group of organisms that obtain energy from the oxidation of inorganic compounds.

    Signup and view all the flashcards

    Lateral Gene Transfer

    The acquisition of new DNA by an organism from a donor organism, often a different species.

    Signup and view all the flashcards

    Speciation

    The evolutionary process by which new species arise from pre-existing species.

    Signup and view all the flashcards

    Monophyletic group

    A group of organisms classified as belonging to the same evolutionary lineage.

    Signup and view all the flashcards

    Speciation

    The evolutionary process by which new species arise from pre-existing species.

    Signup and view all the flashcards

    Yellowstone hot spring microbial community

    A microbial community in Yellowstone National Park characterized by extremely high temperatures near boiling water.

    Signup and view all the flashcards

    Photoautotrophs

    A group of organisms that obtain energy from sunlight and use carbon dioxide as their primary carbon source.

    Signup and view all the flashcards

    Chemoautotrophs

    A group of organisms that obtain energy from the oxidation of inorganic compounds.

    Signup and view all the flashcards

    Chemoautotrophs

    A group of organisms that obtain energy from the oxidation of inorganic compounds.

    Signup and view all the flashcards

    Phototrophs

    A group of organisms characterized by their ability to use sunlight for energy and carbon dioxide to build their own food.

    Signup and view all the flashcards

    More Like This

    The Air We Breathe
    5 questions

    The Air We Breathe

    CaptivatingJudgment avatar
    CaptivatingJudgment
    Use Quizgecko on...
    Browser
    Browser