Lecture 12: Evolution of the Vertebrate Brain: Conserved vs. Novel Features
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Lecture 12: Evolution of the Vertebrate Brain: Conserved vs. Novel Features

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Questions and Answers

What does brain size mainly provide a rough estimate of?

  • Number of neurons (correct)
  • Cognitive performance
  • Learning ability
  • Behavioral flexibility

    • In terms of brain size and neurons, what does a bigger brain not necessarily mean?

  • More learning ability
  • More cognitive capacity
  • More neurons (correct)
  • More behavioral flexibility

    • How does increased brain size affect behavioral flexibility according to the text?

  • Increases cognitive capacity
  • Reduces adaptability
  • Impacts learning ability
  • Improves fine-tuning to changing circumstances (correct)

    • What can change with increased brain size, leading to greater adaptability?

    <p>Number of connections between subcomponents</p> Signup and view all the answers

    Which statement best describes humans in relation to brain size among mammals?

    <p>They have the brainiest order of mammals</p> Signup and view all the answers

    Among primates, how do humans rank in terms of braininess?

    <p>Most brainy</p> Signup and view all the answers

    What is a problem with the scala naturae view when considering the vertebrate brain?

    <p>It only looks at brain size, ignoring the basic organization of the vertebrate brain.</p> Signup and view all the answers

    Why is it mentioned that a blue whale having a larger brain compared to a baboon is not necessarily indicative of evolutionary progress?

    <p>Because the blue whale has a larger body size, which influences its brain size.</p> Signup and view all the answers

    What does the availability of extra neural tissue in the baboon imply?

    <p>The baboon's brain may have a greater processing capacity than expected for its body size.</p> Signup and view all the answers

    What percentage of energy (oxygen) does a fish's brain typically consume relative to its body mass?

    <p>60%</p> Signup and view all the answers

    How does the relationship between brain size and body size change as overall body size increases?

    <p>Brain size increases at a fraction of body size, ranging between 0.67 and 0.75.</p> Signup and view all the answers

    What does the equation Y = aX^b describe in relation to brain and body sizes?

    <p>The mathematical representation of how brain size changes concerning overall body size.</p> Signup and view all the answers

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