Classification Project

Bottlenose dolphin (Tursiop truncatus)

 -Kingdom = Animalia

 -Phylum = Chordata

 -Class = Mammalia

 -Order = Cetacea

 -Genus = Tursiop 

 -Species = truncatus

Giraffe (Giraffa camelopardalis)

 -Kingdom = Animalia

 -Phylum = Chordata

 -Class = Mammalia

 -Order = Artiodactylia

 -Family = Giraffidae

 -Genus = Giraffa

 -Species = camelopardalis

Camel (Camelus bactrianus)

 -Kingdom = Animalia

 -Phylum = Chordata

 -Class = Mammalia

 -Order = Artiodactyla

 -Family = Camelidae

 -Genus = Camelus

 -Species = bactrianus

Lion (Panthera leo)

 -Kingdom = Animalia

 -Phylum = Chordata

 -Class = Mammalia

 -Order = Carnivora

 -Family = Felidae

 -Genus = Panthera

 -Species = leo

Domestic Cat (Felis catus)

 -Kingdom = Animalia

 -Phylum = Chordata

 -Class = Mammalia

 -Order = Carnivora

 -Family = Felidae

 -Genus = Felis

 -Species = catus

I learned that all these animals are in the same kingdom, phylus, and class. The differences begin in the order in which they belong. However, a lion and a domestic house cat have extreme similarities and remain the same up until their genus classifications. Also, a camel and a giraffe are in the same order. My question is: how are house cats and lions almost the same in classification yet look completely different in size and appearance?!