Explain how animals in vertebrate are divided into further subgroups.
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Vertebrata are classified into five groups based upon several characteristics.
Warm vs Cold blooded, mammals & birds vs fish, reptiles, & amphibians.
Mammals & birds can be differentiated by hair or fur vs feathers.
Mammals also have mammory glands so the females feed milk to their young.
Reptiles have dry scaly skin and lungs.
Amphibians have moist skin (not scales) and gills when young and lungs as adults.
Fish have gills throughtout life and live...
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The major characteristics used to classify animals in vertebrate are : 1) The kind of exoskeleton or endoskeleton . 2) The kind of respiratory organs . 3) The method of reproduction and giving birth to young ones . On the basis of above mentioned characters the vertebrate is divided into following classes .
1) Exoskeleton of Scales : Endoskeleton of cartilage or bones ; breathing through gills - Pisces ( fishes ) .
2) Breathing through gills only in larva ; Skin slimy - Amphibia .
3) Exoskeleton of Scales or Scutes ; laying eggs outside the water - Reptilia .
4) Exoskeleton of feathers ; lays egg ; flight possible - Aves ( bird ) .
5) Exoskeleton of hair ; external ears , ; give birth to young ones - Mammalia .
1) Exoskeleton of Scales : Endoskeleton of cartilage or bones ; breathing through gills - Pisces ( fishes ) .
2) Breathing through gills only in larva ; Skin slimy - Amphibia .
3) Exoskeleton of Scales or Scutes ; laying eggs outside the water - Reptilia .
4) Exoskeleton of feathers ; lays egg ; flight possible - Aves ( bird ) .
5) Exoskeleton of hair ; external ears , ; give birth to young ones - Mammalia .
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