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Vertebrates
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Marine mammals have __________ skin.
Thick
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True or False: All birds can fly.
False
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Birds have __________ to keep warm and protect their body.
Feathers
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Mammals breathe through their __________.
Lungs
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Amphibians undergo a process of __________.
Metamorphosis
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Mammals have __________ or hair to keep warm.
Fur
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When amphibians are babies, they use __________ to breathe.
Gills
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Amphibians have thin and __________ skin.
Moist
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Birds use their __________ instead of teeth to eat.
Beak
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True or False: All birds have wings.
True
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Most reptiles have __________ lungs except for snakes.
Two
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What is the biggest group of vertebrates?
Fish
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Mammals are viviparous except the __________ who are oviparous.
Monotremes
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Amphibians live in __________ water or on land near rivers.
Fresh
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When amphibians are adults, they breathe through their lungs or through their __________.
Skin
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Fish have __________ to protect their bodies.
Scales
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Birds are oviparous and they build a __________ to incubate the eggs.
Nest
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Birds breathe through their __________.
Lungs
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Amphibians are oviparous and they lay their eggs __________.
Underwater
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Mammals usually have four limbs and some of them have a __________.
Tail
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Reptiles have thick and __________ skin and their bodies are completely covered in scales.
Dry
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When fishes swim, they use their __________ and tail to move and keep balance.
Fins
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Amphibians use their sticky __________ to eat.
Tongue
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Okay!
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