CH 1: The classification of organisms
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Questions and Answers

What is a key characteristic of protists?

  • Autotrophic nature (correct)
  • Presence in terrestrial environments
  • Tissue differentiation
  • Unicellularity and multicellularity

    • Which group of protists is primarily autotrophic and forms the foundation of aquatic food chains?

  • Algae
  • Fungi
  • Plant-like Protists (correct)
  • Animal-like Protists

    • What type of organisms are zooplankton?

  • Decomposers
  • Unicellular autotrophs
  • Photosynthetic organisms
  • Multicellular heterotrophs (correct)

    • What do fungi primarily use as sources of nutrients?

    <p>Living organisms</p> Signup and view all the answers

    Which organism lacks cellular structures and relies on host cells for replication?

    <p>Viruses</p> Signup and view all the answers

    What is the role of fungi in ecosystems?

    <p>Nutrient cycling by decomposing dead organic matter</p> Signup and view all the answers

    Which characteristic distinguishes viruses from other organisms?

    <p>Dependence on host cells for replication</p> Signup and view all the answers

    What is the primary role of viruses?

    <p>Causing diseases and disease transmission</p> Signup and view all the answers

    Which category of organisms can be both autotrophic and heterotrophic?

    <p>Protists</p> Signup and view all the answers

    How do protists exhibit locomotion?

    <p>Using flagella or pseudopodia</p> Signup and view all the answers

    What is the basic structural characteristic of bacteria?

    <p>Lack of a membrane-bound nucleus</p> Signup and view all the answers

    Which shape is NOT commonly observed in bacteria?

    <p>Fungi (filamentous)</p> Signup and view all the answers

    How do autotrophic bacteria obtain nutrition?

    <p>Through photosynthesis or chemosynthesis</p> Signup and view all the answers

    Which process is the primary mode of reproduction in bacteria?

    <p>Binary fission</p> Signup and view all the answers

    What is the function of endospores in bacteria?

    <p>To enable survival under unfavorable conditions</p> Signup and view all the answers

    Which Kingdom do protists belong to?

    <p>Kingdom Protista</p> Signup and view all the answers

    Where do protists primarily inhabit?

    <p>Aquatic environments</p> Signup and view all the answers

    What distinguishes protists from organisms in the plant, animal, or fungal kingdoms?

    <p>Belonging to the Kingdom Protista.</p> Signup and view all the answers

    Which of the following is NOT a common shape exhibited by bacteria?

    <p>Cuboidal (cube-shaped)</p> Signup and view all the answers

    What distinguishes autotrophic bacteria from heterotrophic bacteria?

    <p>Their capability to synthesize their own food.</p> Signup and view all the answers

    How do bacteria reproduce under normal conditions?

    <p>Through binary fission</p> Signup and view all the answers

    What is the primary structural component of a bacterial cell wall?

    <p>Polysaccharides</p> Signup and view all the answers

    Which bacterial shape is comma-shaped?

    <p>Vibrio</p> Signup and view all the answers

    How do autotrophic bacteria obtain nutrition?

    <p>By photosynthesis or chemosynthesis</p> Signup and view all the answers

    What is the primary mode of reproduction in bacteria under unfavorable conditions?

    <p>Endospore formation</p> Signup and view all the answers

    Which category do protists belong to?

    <p>Kingdom Protista</p> Signup and view all the answers

    What distinguishes protists from organisms in the plant, animal, or fungal kingdoms?

    <p>They possess a membrane-bound nucleus</p> Signup and view all the answers

    What is the basic structure of bacterial cells?

    <p>Cell wall</p> Signup and view all the answers

    What type of reproduction occurs primarily in bacteria?

    <p>Binary fission</p> Signup and view all the answers

    What is the primary way bacteria obtain nutrition?

    <p>By absorbing nutrients from the environment directly through their cell membrane</p> Signup and view all the answers

    Which group of organisms primarily obtain nutrients as parasites from living organisms?

    <p>Animal-like protists</p> Signup and view all the answers

    Which organism reproduces both sexually and asexually, and can produce spores for dispersal?

    <p>Fungi</p> Signup and view all the answers

    Which group of organisms is multicellular and contains various photosynthetic pigments?

    <p>Algae</p> Signup and view all the answers

    Which group of organisms lacks cellular structures and relies on host cells for replication?

    <p>Viruses</p> Signup and view all the answers

    Which organism plays a crucial role in nutrient cycling by decomposing dead organic matter?

    <p>Fungi</p> Signup and view all the answers

    Which group of organisms can be found in both aquatic and terrestrial environments?

    <p>Fungi</p> Signup and view all the answers

    Which organism is commonly known as seaweeds and can be free-floating or sessile?

    <p>Algae</p> Signup and view all the answers

    Which group of organisms primarily obtain nutrients as saprotrophs from dead organic matter?

    <p>Fungi</p> Signup and view all the answers

    Which organism is primarily known for causing diseases in plants and animals?

    <p>Viruses</p> Signup and view all the answers

    Which group of organisms is primarily found in water and can be both autotrophic and heterotrophic?

    <p>Protists</p> Signup and view all the answers

    Which group of organisms is primarily multicellular, contains various photosynthetic pigments, and can be both free-floating and sessile?

    <p>Algae</p> Signup and view all the answers

    Which organisms are primarily unicellular, heterotrophic, and some of which are parasitic, causing diseases like malaria?

    <p>Animal-like protists</p> Signup and view all the answers

    Which organisms are primarily found in water, can be both autotrophic and heterotrophic, and can exhibit locomotion using flagella or pseudopodia?

    <p>Protists</p> Signup and view all the answers

    Which group of organisms is primarily multicellular, has chitin-containing cell walls, and can reproduce both sexually and asexually, producing spores for dispersal?

    <p>Fungi</p> Signup and view all the answers

    Which group of organisms consists of genetic material (DNA or RNA) enclosed in a protein coat called a capsid, lacks cellular structures, and relies on host cells for replication?

    <p>Viruses</p> Signup and view all the answers

    Which organisms play a crucial role in nutrient cycling by decomposing dead organic matter and releasing nutrients back into the soil?

    <p>Fungi</p> Signup and view all the answers

    Which organisms are primarily found in aquatic environments, are primarily autotrophic, and form the foundation of aquatic food chains?

    <p>Phytoplankton</p> Signup and view all the answers

    Which organisms are primarily known for causing diseases in plants and animals, and can form mutualistic relationships with other organisms?

    <p>Fungi</p> Signup and view all the answers

    Which organisms primarily obtain nutrients as parasites from living organisms?

    <p>Animal-like protists</p> Signup and view all the answers

    Which organisms play a significant role in disease transmission and have shaped the course of human history?

    <p>Viruses</p> Signup and view all the answers

    Which organism, classified under Kingdom Monera, exhibits a spiral-shaped structure?

    <p>Spirillum</p> Signup and view all the answers

    Which nutritional strategy enables bacteria to synthesize their own food through the use of chemical reactions?

    <p>Chemosynthesis</p> Signup and view all the answers

    Which statement best describes the reproduction of bacteria under unfavorable conditions?

    <p>Bacteria form endospores, which are resilient structures that enable survival until conditions improve</p> Signup and view all the answers

    Which characteristic distinguishes protists from other eukaryotic organisms?

    <p>Protists do not fit neatly into the plant, animal, or fungal kingdoms</p> Signup and view all the answers

    Which process do bacteria use to obtain external sources of nutrition?

    <p>Endocytosis</p> Signup and view all the answers

    Which statement best describes the role of bacteria in ecosystems?

    <p>Most bacteria are beneficial and participate in vital ecological processes</p> Signup and view all the answers

    Which nutritional strategy allows some protists to produce their own food using light energy?

    <p>Photosynthesis</p> Signup and view all the answers

    Which statement best describes the structure of bacterial cells?

    <p>Bacterial cells are prokaryotic and lack a membrane-bound nucleus</p> Signup and view all the answers

    Which nutritional strategy allows bacteria to obtain food using chemical reactions?

    <p>Chemosynthesis</p> Signup and view all the answers

    Which statement best describes the reproduction of bacteria under normal conditions?

    <p>Bacteria undergo binary fission, producing daughter cells with identical genetic material</p> Signup and view all the answers

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