Mulley - fish

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1. Which is NOT a problem with the fossil record

  • Not enough species have existed to fossilise
  • Only around 15% rocks are capable of fossilisation
  • Only around 1 bone in a billion is thought to become a fossil
  • Large time scales
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2. What are Chimaeras?

  • Cartilaginous fish belonging to the Myxini
  • Cartilaginous fish belonging to the Holocephla
  • Cartilaginous fish belonging to the Elasmobranchii
  • Bony fish belonging to the Teleosteii

3. Which of these does NOT aid in drag reduction

  • Mucus
  • Boundary layer control
  • Swimming faster
  • Streamlining

4. Which of these is NOT a characteristic of modern vertebrates?

  • Tripartite brain
  • Placodes
  • Post anal tail
  • W-shaped myotomes
  • High metabolic rate

5. How is ventilation carried out?

  • The expansion and retraction of the buccal cavity
  • Lung like alveoli
  • Skin diffusion
  • A separate compartment adjacent to the swim bladder
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