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    Starts with  
    A
    Kingdom of Vertebrates
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    B
    Any fish of the class Osteichthyes
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    C
    Any animal having a notochord or spinal column
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    D
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    E
    Animals that can maintain their body temperature independently of their environment.
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    F
    Shape of the body that facilitates movement in the air or in the water, that is wide in the middle and tapers at both ends.
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    G
    Respiratory organ of aquatic animals that breathe oxygen dissolved in water
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    H
    Symmetrical tail fin (as in most bony fishes)
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    I
    Any organism that feeds mainly on insects
    Starts with  
    J
    The part of the skull of a vertebrate that frames the mouth and holds the teeth
    Starts with  
    K
    Tailles, grey marsupial that lives in trees in Australia
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    L
    Either of two saclike respiratory organs in the chest of terrestrial vertebrates
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    M
    Egg-laying mammal
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    N
    Active during the night
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    O
    A hard flap serving as a cover for the gill in bony fishes
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    P
    The structure in the uterus of some mammals providing oxygen and nutrients for and transferring wastes from the developing baby
    Contains  
    Q
    Order of reptiles to which snakes and lizards belong
    Starts with  
    R
    Ectothermic, terrestrial vertebrates with scales and four short limbs
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    S
    Amniotic eggs have a hard .............. which prevents the eggs from drying out.
    Starts with  
    T
    A vertebrate animal having four limbs or legs
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    U
    Adults of this order of amphibians have a long body, tail and four short limbs, approximately the same size
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    V
    Animals that gives birth to living beings, they don't lay eggs
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    W
    Contains  
    X
    Amphibian reproduction is.... (two parents needed)
    Starts with  
    Y
    Nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg)
    Starts with  
    Z