- Ray-finned fish
- Lobe-finned fish
- Cartilaginous fish
- Jawless fish
Category: DIVERSITY AMONG ANTMALS (THE KTNGDOM ANIMALIA)
- Asteroidea
- Ophiuroidea
- Echinoidea
- Holothuroidea
- Gastropoda
- Bivalvia
- Cephalopoda
- Polyplacophora
- Chelicerata
- Myriapoda
- Crustacea
- Hexapoda
- A nerve net
- A dorsal hollow nerve cord
- Ladder-like nervous system
- A single ganglion
- Annelida
- Mollusca
- Platyhelminthes
- Nematoda
- Planula
- Polyp
- Medusa
- Hydroid
- Monotremes
- Marsupials
- Placentals
- All mammals
- Water absorption
- Gas exchange
- Preventing water loss
- Sensing vibrations
- Running
- Burrowing
- Flight muscle attachment
- Swimming
- Operculum
- Swim bladder
- Lateral line
- Cloaca
- Locomotion
- Feeding
- Defense and cleaning
- Reproduction
- Coelacanth
- Lamprey
- Shark
- Tuna
- Open
- Closed
- Absent
- Double
- Cnidaria
- Platyhelminthes
- Annelida
- Porifera
- Asexual fragmentation
- Budding
- Sexual reproduction with complex life cycles
- Binary fission
- Three germ layers
- Three body segments
- Three distinct cell types
- Three modes of reproduction
- Carnivora
- Primates
- Cetacea
- Pinnipedia
- Furcula
- Sternum (keel)
- Pygostyle
- Scapula
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