Across
- 2. group of animals with no symmetry, cephalization, or gut
- 3. animal that can regulate its own body temperature (warm-blooded
- 6. group of animals with a backbone
- 8. group of animals with jointed appendages
- 10. animals without a backbone
- 12. vertebrate that usually lives in water but can also live on land as an adult
- 14. mammal that provides embryo with oxygen and food through placenta
- 15. mammal with a pouch to raise its young
- 16. flexible rod found in chordate animals
Down
- 1. support structure on the inside of the animal bodies
- 4. means that plants can be divided by one or more imaginary lines into mirror-image halves
- 5. group of animals with stinging cells (jellyfish)
- 7. animal with a body temperature that is determined by the environment (cold-blooded)
- 9. effort to define boundaries between various kinds of animals
- 11. support structure on the outside of animals bodies
- 13. animals known for their soft body and usually a shell (clam)