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Explain how animals in Vertebrata are classified into further subgroups.
 
a. Class Pisces:
 
b. Class Reptilia:
 
c. Class Amphibia:
 
d. Class Aves:
 
e. Class Mammalia:
Answer variants:
The class consists of organisms with four-chambered hearts, are typically warm-blooded
They breathe through their gills and have a two-chambered heart
The Reptilia includes animals that have tough scales covering their bodies and are cold-blooded.
They are oviparous and have hollow bones with air cavities
Animals such as frogs and toads can live on land and in water.