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Birds lay eggs with a hard shell covering.
Humans are a type of mammals called Placental.
Birds have no teeth, but they do have feathers, and hollow bones for lighter skeletons.
Mammals have either hairs or fur all over their bodies A Humming Bird is an example of birds.
A Human is a type of a mammal.
Frog eggs are black and white with a gel covering. Amphibians have no claws.
Reptiles have scaly skin and claws on their toes.
Bony Fish are the biggest group of fish with about 20,000 species.
Cartilage Fish have hard scales that are all over their bodies.
Jawless Fish do not have a pair of fins.
Frogs hind legs are strong, 2-3 times longer than the front legs.
Reptiles have a breast bone that protects the lungs and this breast bone is called a sternum.
Bony Fish have a swim bladder.
Cartilage Fish have large wins to glide through the water.
Most jawless fish are flatten and not agile. A frog is an example of Amphibian.
A snake is an example of a Reptile.
A Goldfish an example of a Bony Fish.
A Shark is an example of a Cartilage Fish.
A example of a Jawless fish is a Lamprey.
Vertebrates by ER
Article posted October 22, 2009 at 07:03 PM •
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