Answers

2016-03-05T07:11:56+05:30
Aves: this are warm blooded animal and have a four chambered heart.they lay eggs.there is an outside covering of feathers,and two forelimbs and modified for flight.they breathe through lungs.all birds fall in this category.
amphibia: these animals differ from fish in type lack of scales,in having mucus glands in the skin,and a three chambered heart.respiration is through either gills or lungs.they lay eggs.these animals are found both in water and on land.frogs,toads and salamanders are some example.
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2016-03-05T07:45:04+05:30
Aves:  warm blooded animal
 have a four chambered heart
 lay eggs.there
 covering of feathers,and two forelimbs
they breathe through lungs
all birds included in this category.
amphibians:  
 do not have scales
 three chambered heart
respiration is taken place via gills or lungs
found both in water and on land.
lay eggs.
examples frogs,toads and salamanders 
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