Recognition Features of Vertebrates

Apart from fish, all chordate vertebrates are tetrapods with pentadactyl limbs (some were lost or modified via evolution)

Bony Ray Finned Fish Feathers growing from skin

Bony Ray Finned Fish Teeth of different types

Bony Ray Finned Fish Mammary glands secrete milk

Bony Ray Finned Fish Hairs growing from the skin

Bony Ray Finned Fish Larval stage lives in water

Amphibians External fertilization in water

Amphibians Scales grow from the skin

Amphibians Give birth to live young

Amphibians Swim bladde for buyoancy

Amphibians Internal fertilization

Reptiles Fins supported by rays

Reptiles Lungs w extensive folding

Reptiles Dry scaly impermeable skin

Reptiles One type of teeeth

Reptiles External Fertilization

Birds Lungs with alveoli

Birds Hard shells around the eggs

Birds Protective gel around eggs

Birds Wings instead of front legs

Birds Lungs with parabronchial tubes

Mammals Lungs with small intestinal folds

Mammals Soft moist permeable skin

Mammals Beak but no teeth

Mammals Soft shells around eggs

Mammals Gills with a single gill slit

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