Animal Adaptations and Nervous Systems Quiz
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Questions and Answers

What is the role of the central nervous system (CNS)?

  • Mediating the transmission from sensory neurons to effectors
  • Acting directly on the effectors (smooth muscle)
  • Processing sensory information and coordination of motor output (correct)
  • Receiving external stimuli and transmitting information to effectors

    • Where did actual neurons first appear?

  • Sponges and Placozoa
  • Ctenophora and Cnideria (correct)
  • Cnideria and Bilaterians
  • Bilaterians and Sponges

    • What is the possible scenario for the origin of neurons?

  • Ancestral plurifunctional sensory/contractile myoepithelial cell (correct)
  • External stimuli acting directly on the effectors
  • Mediation of transmission from sensory neurons to effectors
  • Division of labor into sensory and contractile cells

    • What is the functional polarity of neurons responsible for?

    <p>Ensuring the unidirectional flow of information</p> Signup and view all the answers

    Which organisms do not possess a nervous system?

    <p>Sponges and Placozoa</p> Signup and view all the answers

    What is the role of the central nervous system (CNS)?

    <p>Processing of sensory information and coordination of motor output</p> Signup and view all the answers

    Where did actual neurons first appear?

    <p>Ctenophora and bilaterians</p> Signup and view all the answers

    What is the possible scenario for the origin of neurons?

    <p>Ancestral plurifunctional sensory/contractile myoepithelial cell</p> Signup and view all the answers

    What is the functional polarity of neurons responsible for?

    <p>Unidirectional flow of information</p> Signup and view all the answers

    Which organisms do not possess a nervous system?

    <p>Sponges and placozoa</p> Signup and view all the answers

    Which of the following is a common mode of asexual reproduction in cnidarians?

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

    What is the process where two different gametes fuse to form a zygote?

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

    In which type of reproduction does genetic recombination occur?

    <p>Sexual reproduction</p> Signup and view all the answers

    Which type of reproduction allows every member of the population to convert resources to offspring efficiently?

    <p>Asexual reproduction</p> Signup and view all the answers

    What is apomixis in the context of reproduction?

    <p>Development of an embryo without fertilization</p> Signup and view all the answers

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