Animal Kingdom Dichotomous Key
Backbone
Vertebrate
Internal fertilization
Warm-Blooded
hair
Mammalia
feathers
Aves
Cold Blooded
Breathe with lungs
Reptillia
No lungs
Chondrichthyes
Subtopic
External fertilization
Legs
Amphibia
No legs
Bone
Actinopterygii
Cartilage
Agnathans
Invertebrate
Circulatory system
Mollusca
No circulatory system
Coelom
Digestive system
Aquatic
Freshwater
Annelida
Marine
Echinodermata
Terrestrial
Arthropoda
Digestive tract
Parasitic
Nematoda
Harmless
Rotifera
No Coelom
Nerves
Bilateral
Platyhelminthes
Radial
Cnideria
No nerves
Porifera