Across
- 4. cold-blooded vertebrate with scales
- 8. relationship in which one organism benefits and the other is unaffected
- 11. colonial cnidarian that secretes a hard skeleton
- 15. internal support structure found in vertebrates
- 18. Symmetry in which body parts are around a central axis or circular body type
- 19. animal with an exoskeleton, segmented body, and jointed appendages
- 20. Animals that have a nerve running down their back.
Down
- 1. major developmental change from juvenile to adult
- 2. animal that consumes both plants and other animals
- 3. chordata that possess a backbone
- 5. Credited with coming up with the idea of taxonemy
- 6. Animal group including snails, clams, and octopuses
- 7. Marine animal group including sea stars and sea urchins
- 9. simplest animal on earth belonging to porifera
- 10. Biological process of producing offspring
- 12. external supportive covering found in arthropods
- 13. Body Symmetry with left and right sides that mirror each other
- 14. relationship where both organisms benefit
- 16. animal group that includes jelly fish and sea anemones
- 17. vertebrate that lives part of its life in water and part on land