features of vertebrates

    Cards (5)

    • Amphibians
      • soft, moist permeable skin
      • external fertilisation in water
      • protective gel around eggs
      • larval stage lives in water
    • Bony Fish
      • scaly skin
      • gills
      • swim bladder for buoyancy
      • external fertilisation
    • Reptiles
      • dry, scaly skin
      • internal fertilisation
      • soft shelled eggs
    • Birds
      • feathers
      • Wings instead of front legs
      • hard shelled eggs
      • beack but no teeth
    • Mammals
      • hairy skin
      • give birth to live young
      • mammary glands that secrete milk
      • differt types of teeth
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