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VERTEBRATES!

Across
Hard and pointed structure sticking out from a bird´s face.
Small amphibian that looks like a lizard.
Fish are covered with:
What group of vertebrates is a shark?
Which word describes the different stages of an animal´s life?
What group of vertebrates are robins and owls?
Down
Large reptile which has a thick shell covering its body and which lives in the sea most of the time.
Birds are the only animals with:
They breathe through their skin and lungs.
All vertebrates are animals with:
They give birth to their young.
What word means body temperature stays the same no matter what the outside temperature is?
Fish breath in water, using their:
Mammals are the only animal with: