- Radial symmetry
- Stinging cells (cnidocytes)
- Tentacles
- A gastrovascular cavity
No category found.
- Heterotrophic
- Multicellular
- Cell walls made of chitin
- Motility at some life stage
- Ostrich
- Emu
- Condor
- Albatross
- Alligators and crocodiles
- Lizards and snakes
- Turtles and tortoises
- Tuataras
- Ganoid scales
- Cycloid scales
- Ctenoid scales
- Placoid scales
- Asteroidea
- Ophiuroidea
- Echinoidea
- Holothuroidea
- Cephalopoda
- Bivalvia
- Polyplacophora (Chitons)
- Gastropoda
- Support
- Protection
- Attachment for muscles
- All of the above
- Flatworms
- Segmented worms
- Roundworms
- Comb jellies
- Digestion and circulation
- Respiration and excretion
- Reproduction and locomotion
- Sensing and defense
- Pinacocytes
- Amoebocytes
- Choanocytes
- Porocytes
- Marsupials
- Monotremes
- Placentals
- All of the above
- Sternum
- Keel
- Furcula
- Pygostyle
- Turtle
- Crocodile
- Boa constrictor
- Cobra
- Caudata
- Anura
- Gymnophiona
- Urodela
- Mammals
- Birds
- Reptiles
- Fish
- Respiration
- Buoyancy control
- Digestion
- Reproduction
